20610031172 has 12 divisors (see below), whose sum is σ = 36078503916. Its totient is φ = 10301887200.

The previous prime is 20610031133. The next prime is 20610031187. The reversal of 20610031172 is 27113001602.

It can be written as a sum of positive squares in 2 ways, for example, as 1594724356 + 19015306816 = 39934^2 + 137896^2 .

It is a super-3 number, since 3×20610031172³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767243 + ... + 793650.

It is an arithmetic number, because the mean of its divisors is an integer number (3006541993).

Almost surely, 2^20610031172 is an apocalyptic number.

It is an amenable number.

20610031172 is a deficient number, since it is larger than the sum of its proper divisors (15468472744).

20610031172 is a wasteful number, since it uses less digits than its factorization.

20610031172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564198 (or 1564196 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 20610031172 its reverse (27113001602), we get a palindrome (47723032774).

The spelling of 20610031172 in words is "twenty billion, six hundred ten million, thirty-one thousand, one hundred seventy-two".