20394668031 has 32 divisors (see below), whose sum is σ = 28600320000. Its totient is φ = 12902506848.

The previous prime is 20394668023. The next prime is 20394668033. The reversal of 20394668031 is 13086649302.

It is not a de Polignac number, because 20394668031 - 2³ = 20394668023 is a prime.

It is a super-2 number, since 2×20394668031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20394668033) 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, 5202090 + ... + 5206008.

It is an arithmetic number, because the mean of its divisors is an integer number (893760000).

Almost surely, 2^20394668031 is an apocalyptic number.

20394668031 is a deficient number, since it is larger than the sum of its proper divisors (8205651969).

20394668031 is a wasteful number, since it uses less digits than its factorization.

20394668031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4523.

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 20394668031 in words is "twenty billion, three hundred ninety-four million, six hundred sixty-eight thousand, thirty-one".