21633041540 has 24 divisors (see below), whose sum is σ = 49559332032. Its totient is φ = 7866560480.

The previous prime is 21633041537. The next prime is 21633041567. The reversal of 21633041540 is 4514033612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49165784 + ... + 49166223.

It is an arithmetic number, because the mean of its divisors is an integer number (2064972168).

Almost surely, 2^21633041540 is an apocalyptic number.

21633041540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21633041540 is an abundant number, since it is smaller than the sum of its proper divisors (27926290492).

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

21633041540 is a wasteful number, since it uses less digits than its factorization.

21633041540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98332027 (or 98332025 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 21633041540 in words is "twenty-one billion, six hundred thirty-three million, forty-one thousand, five hundred forty".