20649352824 has 96 divisors (see below), whose sum is σ = 56323884240. Its totient is φ = 6834240000.

The previous prime is 20649352819. The next prime is 20649352877. The reversal of 20649352824 is 42825394602.

It is a self number, because there is not a number n which added to its sum of digits gives 20649352824.

It is a congruent number.

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, 6879324 + ... + 6882324.

Almost surely, 2^20649352824 is an apocalyptic number.

20649352824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20649352824 is an abundant number, since it is smaller than the sum of its proper divisors (35674531416).

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

20649352824 is a wasteful number, since it uses less digits than its factorization.

20649352824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661 (or 3654 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 20649352824 in words is "twenty billion, six hundred forty-nine million, three hundred fifty-two thousand, eight hundred twenty-four".