20331993800 has 24 divisors (see below), whose sum is σ = 47271886050. Its totient is φ = 8132797440.

The previous prime is 20331993797. The next prime is 20331993809. The reversal of 20331993800 is 839913302.

It can be written as a sum of positive squares in 3 ways, for example, as 9020820484 + 11311173316 = 94978^2 + 106354^2 .

It is not an unprimeable number, because it can be changed into a prime (20331993809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50829785 + ... + 50830184.

Almost surely, 2^20331993800 is an apocalyptic number.

20331993800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20331993800 is an abundant number, since it is smaller than the sum of its proper divisors (26939892250).

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

20331993800 is a wasteful number, since it uses less digits than its factorization.

20331993800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101659985 (or 101659976 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The spelling of 20331993800 in words is "twenty billion, three hundred thirty-one million, nine hundred ninety-three thousand, eight hundred".