21653425233405 has 24 divisors (see below), whose sum is σ = 42894404272512. Its totient is φ = 9898708677984.

The previous prime is 21653425233389. The next prime is 21653425233409. The reversal of 21653425233405 is 50433252435612.

21653425233405 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 3 + 4 + 2 + 5 + 233 + 405 = 666.

It is not a de Polignac number, because 21653425233405 - 2⁴ = 21653425233389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21653425233409) 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, 34370515929 + ... + 34370516558.

It is an arithmetic number, because the mean of its divisors is an integer number (1787266844688).

Almost surely, 2^{21653425233405} is an apocalyptic number.

It is an amenable number.

21653425233405 is a deficient number, since it is larger than the sum of its proper divisors (21240979039107).

21653425233405 is a wasteful number, since it uses less digits than its factorization.

21653425233405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68741032505 (or 68741032502 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 45.

The spelling of 21653425233405 in words is "twenty-one trillion, six hundred fifty-three billion, four hundred twenty-five million, two hundred thirty-three thousand, four hundred five".