20426464464 has 80 divisors (see below), whose sum is σ = 60405693312. Its totient is φ = 5826553344.

The previous prime is 20426464441. The next prime is 20426464547. The reversal of 20426464464 is 46446462402.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156382 + ... + 255554.

Almost surely, 2^20426464464 is an apocalyptic number.

20426464464 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 20426464464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30202846656).

20426464464 is an abundant number, since it is smaller than the sum of its proper divisors (39979228848).

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

20426464464 is a wasteful number, since it uses less digits than its factorization.

20426464464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99804 (or 99798 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 42.

The spelling of 20426464464 in words is "twenty billion, four hundred twenty-six million, four hundred sixty-four thousand, four hundred sixty-four".