1000020431031 has 32 divisors (see below), whose sum is σ = 1384583880960. Its totient is φ = 641247957504.

The previous prime is 1000020431023. The next prime is 1000020431041. The reversal of 1000020431031 is 1301340200001.

It is not a de Polignac number, because 1000020431031 - 2³ = 1000020431023 is a prime.

It is a super-2 number, since 2×1000020431031² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1000020431031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000020431041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25709860 + ... + 25748726.

It is an arithmetic number, because the mean of its divisors is an integer number (43268246280).

Almost surely, 2^{1000020431031} is an apocalyptic number.

1000020431031 is a deficient number, since it is larger than the sum of its proper divisors (384563449929).

1000020431031 is a wasteful number, since it uses less digits than its factorization.

1000020431031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40015.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1000020431031 its reverse (1301340200001), we get a palindrome (2301360631032).

The spelling of 1000020431031 in words is "one trillion, twenty million, four hundred thirty-one thousand, thirty-one".