20311037632 has 56 divisors (see below), whose sum is σ = 41807739600. Its totient is φ = 9778707456.

The previous prime is 20311037627. The next prime is 20311037687. The reversal of 20311037632 is 23673011302.

It is a self number, because there is not a number n which added to its sum of digits gives 20311037632.

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, 677619 + ... + 706957.

Almost surely, 2^20311037632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311037632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20903869800).

20311037632 is an abundant number, since it is smaller than the sum of its proper divisors (21496701968).

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

20311037632 is a wasteful number, since it uses less digits than its factorization.

20311037632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29753 (or 29743 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

Adding to 20311037632 its reverse (23673011302), we get a palindrome (43984048934).

The spelling of 20311037632 in words is "twenty billion, three hundred eleven million, thirty-seven thousand, six hundred thirty-two".