20263423139 has 6 divisors (see below), whose sum is σ = 21525505164. Its totient is φ = 19071456800.

The previous prime is 20263423097. The next prime is 20263423163. The reversal of 20263423139 is 93132436202.

It is a de Polignac number, because none of the positive numbers 2^k-20263423139 is a prime.

It is a super-2 number, since 2×20263423139² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20263423099 and 20263423108.

It is not an unprimeable number, because it can be changed into a prime (20263423189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35057537 + ... + 35058114.

It is an arithmetic number, because the mean of its divisors is an integer number (3587584194).

Almost surely, 2^20263423139 is an apocalyptic number.

20263423139 is a deficient number, since it is larger than the sum of its proper divisors (1262082025).

20263423139 is an equidigital number, since it uses as much as digits as its factorization.

20263423139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70115685 (or 70115668 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 35.

The spelling of 20263423139 in words is "twenty billion, two hundred sixty-three million, four hundred twenty-three thousand, one hundred thirty-nine".