20768297400 has 96 divisors (see below), whose sum is σ = 71535265200. Its totient is φ = 5538211200.

The previous prime is 20768297383. The next prime is 20768297437. The reversal of 20768297400 is 479286702.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 1917591 + ... + 1928390.

Almost surely, 2^20768297400 is an apocalyptic number.

20768297400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20768297400 is an abundant number, since it is smaller than the sum of its proper divisors (50766967800).

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

20768297400 is a wasteful number, since it uses less digits than its factorization.

20768297400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846006 (or 3845991 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 20768297400 in words is "twenty billion, seven hundred sixty-eight million, two hundred ninety-seven thousand, four hundred".