20430277631839 has 4 divisors (see below), whose sum is σ = 21632058669024. Its totient is φ = 19228496594656.

The previous prime is 20430277631833. The next prime is 20430277631867. The reversal of 20430277631839 is 93813677203402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20430277631839 - 2¹³ = 20430277623647 is a prime.

It is a super-2 number, since 2×20430277631839² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430277631839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430277631833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600890518567 + ... + 600890518600.

It is an arithmetic number, because the mean of its divisors is an integer number (5408014667256).

Almost surely, 2^{20430277631839} is an apocalyptic number.

20430277631839 is a deficient number, since it is larger than the sum of its proper divisors (1201781037185).

20430277631839 is a wasteful number, since it uses less digits than its factorization.

20430277631839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201781037184.

The product of its (nonzero) digits is 9144576, while the sum is 55.

The spelling of 20430277631839 in words is "twenty trillion, four hundred thirty billion, two hundred seventy-seven million, six hundred thirty-one thousand, eight hundred thirty-nine".