21613029 has 16 divisors (see below), whose sum is σ = 29562624. Its totient is φ = 14040000.

The previous prime is 21613019. The next prime is 21613043. The reversal of 21613029 is 92031612.

It is not a de Polignac number, because 21613029 - 2¹³ = 21604837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21613019) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28404 + ... + 29154.

It is an arithmetic number, because the mean of its divisors is an integer number (1847664).

Almost surely, 2^21613029 is an apocalyptic number.

It is an amenable number.

21613029 is a deficient number, since it is larger than the sum of its proper divisors (7949595).

21613029 is a wasteful number, since it uses less digits than its factorization.

21613029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 21613029 is about 4648.9815013613. The cubic root of 21613029 is about 278.5513143737.

The spelling of 21613029 in words is "twenty-one million, six hundred thirteen thousand, twenty-nine".