21623245753406 has 64 divisors (see below), whose sum is σ = 36063944928000. Its totient is φ = 9641669157120.

The previous prime is 21623245753397. The next prime is 21623245753423. The reversal of 21623245753406 is 60435754232612.

It is a super-2 number, since 2×21623245753406² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202527185 + ... + 202633923.

It is an arithmetic number, because the mean of its divisors is an integer number (563499139500).

Almost surely, 2^{21623245753406} is an apocalyptic number.

21623245753406 is a deficient number, since it is larger than the sum of its proper divisors (14440699174594).

21623245753406 is a wasteful number, since it uses less digits than its factorization.

21623245753406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107657.

The product of its (nonzero) digits is 7257600, while the sum is 50.

The spelling of 21623245753406 in words is "twenty-one trillion, six hundred twenty-three billion, two hundred forty-five million, seven hundred fifty-three thousand, four hundred six".