19957450 has 12 divisors (see below), whose sum is σ = 37120950. Its totient is φ = 7982960.

The previous prime is 19957417. The next prime is 19957471. The reversal of 19957450 is 5475991.

It can be written as a sum of positive squares in 3 ways, for example, as 16426809 + 3530641 = 4053^2 + 1879^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199525 + ... + 199624.

Almost surely, 2^19957450 is an apocalyptic number.

19957450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19957450 is a deficient number, since it is larger than the sum of its proper divisors (17163500).

19957450 is a wasteful number, since it uses less digits than its factorization.

19957450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399161 (or 399156 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 19957450 is about 4467.3761874281. The cubic root of 19957450 is about 271.2491275358.

The spelling of 19957450 in words is "nineteen million, nine hundred fifty-seven thousand, four hundred fifty".