1020340431 has 24 divisors (see below), whose sum is σ = 1608811776. Its totient is φ = 618002640.

The previous prime is 1020340397. The next prime is 1020340469. The reversal of 1020340431 is 1340430201.

It is not a de Polignac number, because 1020340431 - 2⁶ = 1020340367 is a prime.

It is a super-2 number, since 2×1020340431² = 2082189190266531522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020341431) 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, 303546 + ... + 306888.

It is an arithmetic number, because the mean of its divisors is an integer number (67033824).

Almost surely, 2^1020340431 is an apocalyptic number.

1020340431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1020340431 is a deficient number, since it is larger than the sum of its proper divisors (588471345).

1020340431 is a wasteful number, since it uses less digits than its factorization.

1020340431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6443 (or 6440 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1020340431 is about 31942.7680547569. The cubic root of 1020340431 is about 1006.7346858537.

Adding to 1020340431 its reverse (1340430201), we get a palindrome (2360770632).

The spelling of 1020340431 in words is "one billion, twenty million, three hundred forty thousand, four hundred thirty-one".