21653037453502 has 32 divisors (see below), whose sum is σ = 40061177275392. Its totient is φ = 8547535602144.

The previous prime is 21653037453461. The next prime is 21653037453511. The reversal of 21653037453502 is 20535473035612.

It is a congruent number.

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, 128396008 + ... + 128564539.

It is an arithmetic number, because the mean of its divisors is an integer number (1251911789856).

Almost surely, 2^{21653037453502} is an apocalyptic number.

21653037453502 is a deficient number, since it is larger than the sum of its proper divisors (18408139821890).

21653037453502 is a wasteful number, since it uses less digits than its factorization.

21653037453502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256961032.

The product of its (nonzero) digits is 2268000, while the sum is 46.

The spelling of 21653037453502 in words is "twenty-one trillion, six hundred fifty-three billion, thirty-seven million, four hundred fifty-three thousand, five hundred two".