20465591364 has 81 divisors (see below), whose sum is σ = 52442866749. Its totient is φ = 6729448320.

The previous prime is 20465591359. The next prime is 20465591369. The reversal of 20465591364 is 46319556402.

The square root of 20465591364 is 143058.

It is a perfect power (a square), and thus also a powerful number.

20465591364 is a `hidden beast` number, since 2 + 0 + 465 + 59 + 136 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (20465591359) and next prime (20465591369).

It can be written as a sum of positive squares in only one way, i.e., 360620100 + 20104971264 = 18990^2 + 141792^2 .

It is not an unprimeable number, because it can be changed into a prime (20465591369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 96993219 + ... + 96993429.

Almost surely, 2^20465591364 is an apocalyptic number.

20465591364 is the 143058-th square number.

It is an amenable number.

20465591364 is an abundant number, since it is smaller than the sum of its proper divisors (31977275385).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20465591364 is a wasteful number, since it uses less digits than its factorization.

20465591364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 20465591364 in words is "twenty billion, four hundred sixty-five million, five hundred ninety-one thousand, three hundred sixty-four".