21073639095 has 48 divisors (see below), whose sum is σ = 36675099552. Its totient is φ = 11194018560.

The previous prime is 21073639091. The next prime is 21073639121. The reversal of 21073639095 is 59093637012.

21073639095 is a `hidden beast` number, since 2 + 1 + 0 + 7 + 3 + 639 + 0 + 9 + 5 = 666.

It is not a de Polignac number, because 21073639095 - 2² = 21073639091 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 21073639095.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073639091) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20639685 + ... + 20640705.

It is an arithmetic number, because the mean of its divisors is an integer number (764064574).

Almost surely, 2^21073639095 is an apocalyptic number.

21073639095 is a deficient number, since it is larger than the sum of its proper divisors (15601460457).

21073639095 is a wasteful number, since it uses less digits than its factorization.

21073639095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432 (or 2429 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The spelling of 21073639095 in words is "twenty-one billion, seventy-three million, six hundred thirty-nine thousand, ninety-five".