20396291800 has 48 divisors (see below), whose sum is σ = 47531098440. Its totient is φ = 8139640320.

The previous prime is 20396291767. The next prime is 20396291801. The reversal of 20396291800 is 819269302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20396291801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31162 + ... + 204361.

Almost surely, 2^20396291800 is an apocalyptic number.

20396291800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20396291800 is an abundant number, since it is smaller than the sum of its proper divisors (27134806640).

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

20396291800 is a wasteful number, since it uses less digits than its factorization.

20396291800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235972 (or 235963 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 20396291800 in words is "twenty billion, three hundred ninety-six million, two hundred ninety-one thousand, eight hundred".