21542233995 has 48 divisors (see below), whose sum is σ = 40899699360. Its totient is φ = 10440471552.

The previous prime is 21542233957. The next prime is 21542234011. The reversal of 21542233995 is 59933224512.

21542233995 is a `hidden beast` number, since 215 + 42 + 2 + 3 + 399 + 5 = 666.

It is not a de Polignac number, because 21542233995 - 2¹¹ = 21542231947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21542233995.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 463329 + ... + 507698.

It is an arithmetic number, because the mean of its divisors is an integer number (852077070).

Almost surely, 2^21542233995 is an apocalyptic number.

21542233995 is a deficient number, since it is larger than the sum of its proper divisors (19357465365).

21542233995 is a wasteful number, since it uses less digits than its factorization.

21542233995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971084 (or 971081 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The spelling of 21542233995 in words is "twenty-one billion, five hundred forty-two million, two hundred thirty-three thousand, nine hundred ninety-five".