20459950287 has 16 divisors (see below), whose sum is σ = 31179144192. Its totient is φ = 11690621280.

The previous prime is 20459950267. The next prime is 20459950363. The reversal of 20459950287 is 78205995402.

It is not a de Polignac number, because 20459950287 - 2²⁰ = 20458901711 is a prime.

It is a super-2 number, since 2×20459950287² (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 (20459950207) 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, 474237 + ... + 515577.

It is an arithmetic number, because the mean of its divisors is an integer number (1948696512).

Almost surely, 2^20459950287 is an apocalyptic number.

20459950287 is a deficient number, since it is larger than the sum of its proper divisors (10719193905).

20459950287 is a wasteful number, since it uses less digits than its factorization.

20459950287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64918.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 20459950287 in words is "twenty billion, four hundred fifty-nine million, nine hundred fifty thousand, two hundred eighty-seven".