20212291800 has 96 divisors (see below), whose sum is σ = 69620134800. Its totient is φ = 5389943040.

The previous prime is 20212291793. The next prime is 20212291811. The reversal of 20212291800 is 819221202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1866109 + ... + 1876908.

Almost surely, 2^20212291800 is an apocalyptic number.

20212291800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212291800 is an abundant number, since it is smaller than the sum of its proper divisors (49407843000).

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

20212291800 is a wasteful number, since it uses less digits than its factorization.

20212291800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743042 (or 3743027 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 20212291800 in words is "twenty billion, two hundred twelve million, two hundred ninety-one thousand, eight hundred".