20311029973 has 8 divisors (see below), whose sum is σ = 23160088728. Its totient is φ = 17645781504.

The previous prime is 20311029899. The next prime is 20311029983. The reversal of 20311029973 is 37992011302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5349969 + 20305680004 = 2313^2 + 142498^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-20311029973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311029983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45952336 + ... + 45952777.

It is an arithmetic number, because the mean of its divisors is an integer number (2895011091).

Almost surely, 2^20311029973 is an apocalyptic number.

It is an amenable number.

20311029973 is a deficient number, since it is larger than the sum of its proper divisors (2849058755).

20311029973 is a wasteful number, since it uses less digits than its factorization.

20311029973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91905143.

The product of its (nonzero) digits is 20412, while the sum is 37.

The spelling of 20311029973 in words is "twenty billion, three hundred eleven million, twenty-nine thousand, nine hundred seventy-three".