20001210111988 has 48 divisors (see below), whose sum is σ = 43938585169920. Its totient is φ = 7767714154464.

The previous prime is 20001210111973. The next prime is 20001210111997. The reversal of 20001210111988 is 88911101210002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817297756 + ... + 817322227.

It is an arithmetic number, because the mean of its divisors is an integer number (915387191040).

Almost surely, 2^{20001210111988} is an apocalyptic number.

20001210111988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20001210111988 is an abundant number, since it is smaller than the sum of its proper divisors (23937375057932).

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

20001210111988 is a wasteful number, since it uses less digits than its factorization.

20001210111988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634620036 (or 1634620034 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 34.

The spelling of 20001210111988 in words is "twenty trillion, one billion, two hundred ten million, one hundred eleven thousand, nine hundred eighty-eight".