20762161931 has 8 divisors (see below), whose sum is σ = 25123960800. Its totient is φ = 16749307008.

The previous prime is 20762161919. The next prime is 20762161933. The reversal of 20762161931 is 13916126702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20762161931 - 2¹⁸ = 20761899787 is a prime.

It is a super-2 number, since 2×20762161931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20762161933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87235856 + ... + 87236093.

It is an arithmetic number, because the mean of its divisors is an integer number (3140495100).

Almost surely, 2^20762161931 is an apocalyptic number.

20762161931 is a deficient number, since it is larger than the sum of its proper divisors (4361798869).

20762161931 is a wasteful number, since it uses less digits than its factorization.

20762161931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174471973.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 20762161931 in words is "twenty billion, seven hundred sixty-two million, one hundred sixty-one thousand, nine hundred thirty-one".