21413655 has 12 divisors (see below), whose sum is σ = 37117080. Its totient is φ = 11420592.

The previous prime is 21413647. The next prime is 21413677. The reversal of 21413655 is 55631412.

21413655 is a `hidden beast` number, since 2 + 1 + 4 + 1 + 3 + 655 = 666.

It is not a de Polignac number, because 21413655 - 2³ = 21413647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237885 + ... + 237974.

It is an arithmetic number, because the mean of its divisors is an integer number (3093090).

Almost surely, 2^21413655 is an apocalyptic number.

21413655 is a deficient number, since it is larger than the sum of its proper divisors (15703425).

21413655 is a wasteful number, since it uses less digits than its factorization.

21413655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475870 (or 475867 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 21413655 is about 4627.4890599547. The cubic root of 21413655 is about 277.6921483913.

The spelling of 21413655 in words is "twenty-one million, four hundred thirteen thousand, six hundred fifty-five".