20311107572 has 24 divisors (see below), whose sum is σ = 40682256384. Its totient is φ = 8691894432.

The previous prime is 20311107569. The next prime is 20311107601. The reversal of 20311107572 is 27570111302.

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, 516788 + ... + 554699.

It is an arithmetic number, because the mean of its divisors is an integer number (1695094016).

Almost surely, 2^20311107572 is an apocalyptic number.

It is an amenable number.

20311107572 is an abundant number, since it is smaller than the sum of its proper divisors (20371148812).

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

20311107572 is a wasteful number, since it uses less digits than its factorization.

20311107572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072175 (or 1072173 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 29.

Adding to 20311107572 its reverse (27570111302), we get a palindrome (47881218874).

The spelling of 20311107572 in words is "twenty billion, three hundred eleven million, one hundred seven thousand, five hundred seventy-two".