20696546400 has 144 divisors (see below), whose sum is σ = 68220633600. Its totient is φ = 5449167360.

The previous prime is 20696546383. The next prime is 20696546407. The reversal of 20696546400 is 464569602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20696546407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135021 + ... + 244179.

It is an arithmetic number, because the mean of its divisors is an integer number (473754400).

Almost surely, 2^20696546400 is an apocalyptic number.

20696546400 is a gapful number since it is divisible by the number (20) 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 20696546400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34110316800).

20696546400 is an abundant number, since it is smaller than the sum of its proper divisors (47524087200).

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

20696546400 is a wasteful number, since it uses less digits than its factorization.

20696546400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109261 (or 109248 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 20696546400 in words is "twenty billion, six hundred ninety-six million, five hundred forty-six thousand, four hundred".