20211010988 has 18 divisors (see below), whose sum is σ = 41143844196. Its totient is φ = 8661861768.

The previous prime is 20211010987. The next prime is 20211010993. The reversal of 20211010988 is 88901011202.

It is a super-2 number, since 2×20211010988² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20211010987) 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, 51558506 + ... + 51558897.

It is an arithmetic number, because the mean of its divisors is an integer number (2285769122).

Almost surely, 2^20211010988 is an apocalyptic number.

20211010988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20211010988 is an abundant number, since it is smaller than the sum of its proper divisors (20932833208).

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

20211010988 is a wasteful number, since it uses less digits than its factorization.

20211010988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103117421 (or 103117412 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The spelling of 20211010988 in words is "twenty billion, two hundred eleven million, ten thousand, nine hundred eighty-eight".