21753192252906 has 48 divisors (see below), whose sum is σ = 48745327038720. Its totient is φ = 7003741567680.

The previous prime is 21753192252901. The next prime is 21753192252931. The reversal of 21753192252906 is 60925229135712.

21753192252906 is a `hidden beast` number, since 2 + 1 + 75 + 319 + 2 + 252 + 9 + 0 + 6 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21753192252901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36977971 + ... + 37561638.

It is an arithmetic number, because the mean of its divisors is an integer number (1015527646640).

Almost surely, 2^{21753192252906} is an apocalyptic number.

21753192252906 is an abundant number, since it is smaller than the sum of its proper divisors (26992134785814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21753192252906 is a wasteful number, since it uses less digits than its factorization.

21753192252906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74540171 (or 74540168 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 21753192252906 in words is "twenty-one trillion, seven hundred fifty-three billion, one hundred ninety-two million, two hundred fifty-two thousand, nine hundred six".