20621725073 has 8 divisors (see below), whose sum is σ = 20663151360. Its totient is φ = 20580325920.

The previous prime is 20621725057. The next prime is 20621725099. The reversal of 20621725073 is 37052712602.

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

It is a cyclic number.

It is not a de Polignac number, because 20621725073 - 2⁴ = 20621725057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20621725013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2191208 + ... + 2200598.

It is an arithmetic number, because the mean of its divisors is an integer number (2582893920).

Almost surely, 2^20621725073 is an apocalyptic number.

It is an amenable number.

20621725073 is a deficient number, since it is larger than the sum of its proper divisors (41426287).

20621725073 is an equidigital number, since it uses as much as digits as its factorization.

20621725073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13567.

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 20621725073 in words is "twenty billion, six hundred twenty-one million, seven hundred twenty-five thousand, seventy-three".