20896915740 has 24 divisors (see below), whose sum is σ = 58511364240. Its totient is φ = 5572510848.

The previous prime is 20896915709. The next prime is 20896915751. The reversal of 20896915740 is 4751969802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174140905 + ... + 174141024.

It is an arithmetic number, because the mean of its divisors is an integer number (2437973510).

Almost surely, 2^20896915740 is an apocalyptic number.

20896915740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20896915740 is an abundant number, since it is smaller than the sum of its proper divisors (37614448500).

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

20896915740 is a wasteful number, since it uses less digits than its factorization.

20896915740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348281941 (or 348281939 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 20896915740 in words is "twenty billion, eight hundred ninety-six million, nine hundred fifteen thousand, seven hundred forty".