20091910900 has 36 divisors (see below), whose sum is σ = 43627332672. Its totient is φ = 8031624160.

The previous prime is 20091910879. The next prime is 20091910933. The reversal of 20091910900 is 901919002.

It is a super-2 number, since 2×20091910900² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94839 + ... + 221761.

It is an arithmetic number, because the mean of its divisors is an integer number (1211870352).

Almost surely, 2^20091910900 is an apocalyptic number.

20091910900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20091910900 is an abundant number, since it is smaller than the sum of its proper divisors (23535421772).

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

20091910900 is a wasteful number, since it uses less digits than its factorization.

20091910900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128520 (or 128513 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 20091910900 in words is "twenty billion, ninety-one million, nine hundred ten thousand, nine hundred".