21002653214 has 16 divisors (see below), whose sum is σ = 32189356800. Its totient is φ = 10273077144.

The previous prime is 21002653193. The next prime is 21002653283. The reversal of 21002653214 is 41235620012.

It is a happy number.

It is a super-2 number, since 2×21002653214² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153557 + ... + 256095.

It is an arithmetic number, because the mean of its divisors is an integer number (2011834800).

Almost surely, 2^21002653214 is an apocalyptic number.

21002653214 is a deficient number, since it is larger than the sum of its proper divisors (11186703586).

21002653214 is a wasteful number, since it uses less digits than its factorization.

21002653214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104767.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 21002653214 in words is "twenty-one billion, two million, six hundred fifty-three thousand, two hundred fourteen".