20400231039 has 16 divisors (see below), whose sum is σ = 28081557504. Its totient is φ = 13159648800.

The previous prime is 20400231029. The next prime is 20400231121. The reversal of 20400231039 is 93013200402.

It is not a de Polignac number, because 20400231039 - 2⁴ = 20400231023 is a prime.

It is a super-3 number, since 3×20400231039³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400231029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1210209 + ... + 1226949.

It is an arithmetic number, because the mean of its divisors is an integer number (1755097344).

Almost surely, 2^20400231039 is an apocalyptic number.

20400231039 is a deficient number, since it is larger than the sum of its proper divisors (7681326465).

20400231039 is a wasteful number, since it uses less digits than its factorization.

20400231039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29878.

The product of its (nonzero) digits is 1296, while the sum is 24.

The spelling of 20400231039 in words is "twenty billion, four hundred million, two hundred thirty-one thousand, thirty-nine".