16353925021 has 8 divisors (see below), whose sum is σ = 19334689920. Its totient is φ = 13534282608.

The previous prime is 16353925009. The next prime is 16353925033. The reversal of 16353925021 is 12052935361.

It is an interprime number because it is at equal distance from previous prime (16353925009) and next prime (16353925033).

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

It is not a de Polignac number, because 16353925021 - 2¹⁵ = 16353892253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16353920021) 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, 40280401 + ... + 40280806.

It is an arithmetic number, because the mean of its divisors is an integer number (2416836240).

Almost surely, 2^16353925021 is an apocalyptic number.

It is an amenable number.

16353925021 is a deficient number, since it is larger than the sum of its proper divisors (2980764899).

16353925021 is an equidigital number, since it uses as much as digits as its factorization.

16353925021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80561243.

The product of its (nonzero) digits is 48600, while the sum is 37.

The spelling of 16353925021 in words is "sixteen billion, three hundred fifty-three million, nine hundred twenty-five thousand, twenty-one".