21611003090 has 32 divisors (see below), whose sum is σ = 40681699200. Its totient is φ = 8250102784.

The previous prime is 21611003077. The next prime is 21611003101. The reversal of 21611003090 is 9030011612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1364 + ... + 207903.

It is an arithmetic number, because the mean of its divisors is an integer number (1271303100).

Almost surely, 2^21611003090 is an apocalyptic number.

21611003090 is a deficient number, since it is larger than the sum of its proper divisors (19070696110).

21611003090 is a wasteful number, since it uses less digits than its factorization.

21611003090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209746.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 21611003090 in words is "twenty-one billion, six hundred eleven million, three thousand, ninety".