20147031 has 24 divisors (see below), whose sum is σ = 30270240. Its totient is φ = 12902400.

The previous prime is 20147021. The next prime is 20147033. The reversal of 20147031 is 13074102.

It is not a de Polignac number, because 20147031 - 2¹⁴ = 20130647 is a prime.

It is a super-2 number, since 2×20147031² = 811805716229922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20146995 and 20147013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25815 + ... + 26583.

It is an arithmetic number, because the mean of its divisors is an integer number (1261260).

Almost surely, 2^20147031 is an apocalyptic number.

20147031 is a deficient number, since it is larger than the sum of its proper divisors (10123209).

20147031 is a wasteful number, since it uses less digits than its factorization.

20147031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20147031 is about 4488.5444188512. The cubic root of 20147031 is about 272.1053108289.

It can be divided in two parts, 2014 and 7031, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 20147031 in words is "twenty million, one hundred forty-seven thousand, thirty-one".