20311702240 has 48 divisors (see below), whose sum is σ = 50512003920. Its totient is φ = 7697064960.

The previous prime is 20311702237. The next prime is 20311702261. The reversal of 20311702240 is 4220711302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3337701 + ... + 3343780.

It is an arithmetic number, because the mean of its divisors is an integer number (1052333415).

Almost surely, 2^20311702240 is an apocalyptic number.

20311702240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311702240 is an abundant number, since it is smaller than the sum of its proper divisors (30200301680).

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

20311702240 is a wasteful number, since it uses less digits than its factorization.

20311702240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6681515 (or 6681507 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The spelling of 20311702240 in words is "twenty billion, three hundred eleven million, seven hundred two thousand, two hundred forty".