1020423431 has 8 divisors (see below), whose sum is σ = 1038749184. Its totient is φ = 1002207640.

The previous prime is 1020423409. The next prime is 1020423449. The reversal of 1020423431 is 1343240201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020423431 is a prime.

It is a super-2 number, since 2×1020423431² = 2082527957067623522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020423031) 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, 8651 + ... + 45996.

It is an arithmetic number, because the mean of its divisors is an integer number (129843648).

Almost surely, 2^1020423431 is an apocalyptic number.

1020423431 is a deficient number, since it is larger than the sum of its proper divisors (18325753).

1020423431 is an equidigital number, since it uses as much as digits as its factorization.

1020423431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54981.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1020423431 is about 31944.0672269515. The cubic root of 1020423431 is about 1006.7619828586.

Adding to 1020423431 its reverse (1343240201), we get a palindrome (2363663632).

The spelling of 1020423431 in words is "one billion, twenty million, four hundred twenty-three thousand, four hundred thirty-one".