19906625 has 16 divisors (see below), whose sum is σ = 25204608. Its totient is φ = 15694000.

The previous prime is 19906583. The next prime is 19906633. The reversal of 19906625 is 52660991.

It is not a de Polignac number, because 19906625 - 2¹⁸ = 19644481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7754 + ... + 9996.

It is an arithmetic number, because the mean of its divisors is an integer number (1575288).

Almost surely, 2^19906625 is an apocalyptic number.

It is an amenable number.

19906625 is a deficient number, since it is larger than the sum of its proper divisors (5297983).

19906625 is an equidigital number, since it uses as much as digits as its factorization.

19906625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2319 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 19906625 is about 4461.6840990819. The cubic root of 19906625 is about 271.0186712988.

The spelling of 19906625 in words is "nineteen million, nine hundred six thousand, six hundred twenty-five".