21903962824 has 8 divisors (see below), whose sum is σ = 41069930310. Its totient is φ = 10951981408.

The previous prime is 21903962809. The next prime is 21903962863. The reversal of 21903962824 is 42826930912.

It can be written as a sum of positive squares in only one way, i.e., 17085104100 + 4818858724 = 130710^2 + 69418^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1368997669 + ... + 1368997684.

Almost surely, 2^21903962824 is an apocalyptic number.

It is an amenable number.

21903962824 is a deficient number, since it is larger than the sum of its proper divisors (19165967486).

21903962824 is a wasteful number, since it uses less digits than its factorization.

21903962824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737995359 (or 2737995355 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 21903962824 in words is "twenty-one billion, nine hundred three million, nine hundred sixty-two thousand, eight hundred twenty-four".