21652406540654 has 8 divisors (see below), whose sum is σ = 32478890482488. Its totient is φ = 10826109713160.

The previous prime is 21652406540651. The next prime is 21652406540659. The reversal of 21652406540654 is 45604560425612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21652406540654² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652406540651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46488932 + ... + 46952375.

It is an arithmetic number, because the mean of its divisors is an integer number (4059861310311).

Almost surely, 2^{21652406540654} is an apocalyptic number.

21652406540654 is a deficient number, since it is larger than the sum of its proper divisors (10826483941834).

21652406540654 is a wasteful number, since it uses less digits than its factorization.

21652406540654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93557170.

The product of its (nonzero) digits is 6912000, while the sum is 50.

The spelling of 21652406540654 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred six million, five hundred forty thousand, six hundred fifty-four".