21443502096 has 45 divisors (see below), whose sum is σ = 60016941439. Its totient is φ = 7147248288.

The previous prime is 21443502043. The next prime is 21443502097. The reversal of 21443502096 is 69020534412.

It is a happy number.

The square root of 21443502096 is 146436.

It is a perfect power (a square), and thus also a powerful number.

21443502096 is a `hidden beast` number, since 2 + 1 + 443 + 5 + 0 + 209 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21443502096.

It is not an unprimeable number, because it can be changed into a prime (21443502097) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1751131 + ... + 1763333.

Almost surely, 2^21443502096 is an apocalyptic number.

21443502096 is the 146436-th square number.

It is an amenable number.

21443502096 is an abundant number, since it is smaller than the sum of its proper divisors (38573439343).

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

21443502096 is an frugal number, since it uses more digits than its factorization.

21443502096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24420 (or 12208 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Multiplying 21443502096 by its sum of digits (36), we get a square (771966075456 = 878616²).

21443502096 divided by its sum of digits (36) gives a square (595652836 = 24406²).

The spelling of 21443502096 in words is "twenty-one billion, four hundred forty-three million, five hundred two thousand, ninety-six".