20485832731 has 12 divisors (see below), whose sum is σ = 25663571472. Its totient is φ = 16208570448.

The previous prime is 20485832729. The next prime is 20485832743. The reversal of 20485832731 is 13723858402.

It is not a de Polignac number, because 20485832731 - 2¹ = 20485832729 is a prime.

It is a super-2 number, since 2×20485832731² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20485832761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16079295 + ... + 16080568.

It is an arithmetic number, because the mean of its divisors is an integer number (2138630956).

Almost surely, 2^20485832731 is an apocalyptic number.

20485832731 is a deficient number, since it is larger than the sum of its proper divisors (5177738741).

20485832731 is a wasteful number, since it uses less digits than its factorization.

20485832731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32159890 (or 32159883 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 20485832731 in words is "twenty billion, four hundred eighty-five million, eight hundred thirty-two thousand, seven hundred thirty-one".