20633349465 has 24 divisors (see below), whose sum is σ = 35837350848. Its totient is φ = 10982028960.

The previous prime is 20633349439. The next prime is 20633349487. The reversal of 20633349465 is 56494333602.

20633349465 is a `hidden beast` number, since 2 + 0 + 633 + 3 + 4 + 9 + 4 + 6 + 5 = 666.

It is not a de Polignac number, because 20633349465 - 2¹⁹ = 20632825177 is a prime.

It is a super-2 number, since 2×20633349465² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20633349465.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 444829 + ... + 489018.

It is an arithmetic number, because the mean of its divisors is an integer number (1493222952).

Almost surely, 2^20633349465 is an apocalyptic number.

It is an amenable number.

20633349465 is a deficient number, since it is larger than the sum of its proper divisors (15204001383).

20633349465 is a wasteful number, since it uses less digits than its factorization.

20633349465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934349 (or 934346 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 45.

The spelling of 20633349465 in words is "twenty billion, six hundred thirty-three million, three hundred forty-nine thousand, four hundred sixty-five".