20308763458 has 4 divisors (see below), whose sum is σ = 30463145190. Its totient is φ = 10154381728.

The previous prime is 20308763443. The next prime is 20308763471. The reversal of 20308763458 is 85436780302.

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

It can be written as a sum of positive squares in only one way, i.e., 15948406369 + 4360357089 = 126287^2 + 66033^2 .

It is a super-2 number, since 2×20308763458² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077190863 + ... + 5077190866.

Almost surely, 2^20308763458 is an apocalyptic number.

20308763458 is a deficient number, since it is larger than the sum of its proper divisors (10154381732).

20308763458 is a wasteful number, since it uses less digits than its factorization.

20308763458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10154381731.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 20308763458 in words is "twenty billion, three hundred eight million, seven hundred sixty-three thousand, four hundred fifty-eight".