20988377036 has 48 divisors (see below), whose sum is σ = 42519617280. Its totient is φ = 8970688320.

The previous prime is 20988377023. The next prime is 20988377057. The reversal of 20988377036 is 63077388902.

It is a happy 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, 116051 + ... + 235466.

It is an arithmetic number, because the mean of its divisors is an integer number (885825360).

Almost surely, 2^20988377036 is an apocalyptic number.

It is an amenable number.

20988377036 is an abundant number, since it is smaller than the sum of its proper divisors (21531240244).

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

20988377036 is a wasteful number, since it uses less digits than its factorization.

20988377036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351614 (or 351612 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 20988377036 in words is "twenty billion, nine hundred eighty-eight million, three hundred seventy-seven thousand, thirty-six".