20624741505 has 32 divisors (see below), whose sum is σ = 36672145920. Its totient is φ = 10998080640.

The previous prime is 20624741503. The next prime is 20624741519. The reversal of 20624741505 is 50514742602.

It is a happy number.

20624741505 is a `hidden beast` number, since 20 + 62 + 4 + 74 + 1 + 505 = 666.

It is not a de Polignac number, because 20624741505 - 2¹ = 20624741503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20624741505.

It is not an unprimeable number, because it can be changed into a prime (20624741503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1591000 + ... + 1603910.

It is an arithmetic number, because the mean of its divisors is an integer number (1146004560).

Almost surely, 2^20624741505 is an apocalyptic number.

It is an amenable number.

20624741505 is a deficient number, since it is larger than the sum of its proper divisors (16047404415).

20624741505 is a wasteful number, since it uses less digits than its factorization.

20624741505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24758 (or 24752 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

It can be divided in two parts, 20624 and 741505, that added together give a square (762129 = 873²).

The spelling of 20624741505 in words is "twenty billion, six hundred twenty-four million, seven hundred forty-one thousand, five hundred five".