19942625 has 8 divisors (see below), whose sum is σ = 24888552. Its totient is φ = 15954000.

The previous prime is 19942621. The next prime is 19942661. The reversal of 19942625 is 52624991.

It can be written as a sum of positive squares in 4 ways, for example, as 1760929 + 18181696 = 1327^2 + 4264^2 .

It is not a de Polignac number, because 19942625 - 2² = 19942621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19942621) 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, 79646 + ... + 79895.

It is an arithmetic number, because the mean of its divisors is an integer number (3111069).

Almost surely, 2^19942625 is an apocalyptic number.

It is an amenable number.

19942625 is a deficient number, since it is larger than the sum of its proper divisors (4945927).

19942625 is an equidigital number, since it uses as much as digits as its factorization.

19942625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159556 (or 159546 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 19942625 is about 4465.7166278213. The cubic root of 19942625 is about 271.1819468684.

It can be divided in two parts, 199 and 42625, that added together give a palindrome (42824).

The spelling of 19942625 in words is "nineteen million, nine hundred forty-two thousand, six hundred twenty-five".