21652600453406 has 24 divisors (see below), whose sum is σ = 35171471482920. Its totient is φ = 9992936474976.

The previous prime is 21652600453403. The next prime is 21652600453427. The reversal of 21652600453406 is 60435400625612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652600453403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4116965 + ... + 7762383.

It is an arithmetic number, because the mean of its divisors is an integer number (1465477978455).

Almost surely, 2^{21652600453406} is an apocalyptic number.

21652600453406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21652600453406 is a deficient number, since it is larger than the sum of its proper divisors (13518871029514).

21652600453406 is a wasteful number, since it uses less digits than its factorization.

21652600453406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663020 (or 3663007 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 21652600453406 in words is "twenty-one trillion, six hundred fifty-two billion, six hundred million, four hundred fifty-three thousand, four hundred six".