20236846464 has 128 divisors (see below), whose sum is σ = 60184080000. Its totient is φ = 6693972480.

The previous prime is 20236846463. The next prime is 20236846471. The reversal of 20236846464 is 46464863202.

20236846464 is a `hidden beast` number, since 202 + 368 + 46 + 46 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×20236846464³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20236846463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430387 + ... + 475085.

It is an arithmetic number, because the mean of its divisors is an integer number (470188125).

Almost surely, 2^20236846464 is an apocalyptic number.

20236846464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20236846464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30092040000).

20236846464 is an abundant number, since it is smaller than the sum of its proper divisors (39947233536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20236846464 is a wasteful number, since it uses less digits than its factorization.

20236846464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44853 (or 44835 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 45.

It can be divided in two parts, 202368 and 46464, that added together give a 5-th power (248832 = 12⁵).

The spelling of 20236846464 in words is "twenty billion, two hundred thirty-six million, eight hundred forty-six thousand, four hundred sixty-four".