20430646131 has 32 divisors (see below), whose sum is σ = 33244876800. Its totient is φ = 10908455040.

The previous prime is 20430646127. The next prime is 20430646151. The reversal of 20430646131 is 13164603402.

It is not a de Polignac number, because 20430646131 - 2² = 20430646127 is a prime.

It is a super-2 number, since 2×20430646131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20430646111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 522216 + ... + 559973.

It is an arithmetic number, because the mean of its divisors is an integer number (1038902400).

Almost surely, 2^20430646131 is an apocalyptic number.

20430646131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20430646131 is a deficient number, since it is larger than the sum of its proper divisors (12814230669).

20430646131 is a wasteful number, since it uses less digits than its factorization.

20430646131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082259.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 20430646131 in words is "twenty billion, four hundred thirty million, six hundred forty-six thousand, one hundred thirty-one".