19621051325 has 12 divisors (see below), whose sum is σ = 24663395028. Its totient is φ = 15481814400.

The previous prime is 19621051321. The next prime is 19621051327. The reversal of 19621051325 is 52315012691.

It can be written as a sum of positive squares in 6 ways, for example, as 2244011641 + 17377039684 = 47371^2 + 131822^2 .

It is not a de Polignac number, because 19621051325 - 2² = 19621051321 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19621051321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5373806 + ... + 5377455.

It is an arithmetic number, because the mean of its divisors is an integer number (2055282919).

Almost surely, 2^19621051325 is an apocalyptic number.

It is an amenable number.

19621051325 is a deficient number, since it is larger than the sum of its proper divisors (5042343703).

19621051325 is a wasteful number, since it uses less digits than its factorization.

19621051325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10751344 (or 10751339 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The spelling of 19621051325 in words is "nineteen billion, six hundred twenty-one million, fifty-one thousand, three hundred twenty-five".