19872957 has 8 divisors (see below), whose sum is σ = 28535584. Its totient is φ = 12229488.

The previous prime is 19872929. The next prime is 19872961. The reversal of 19872957 is 75927891.

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

It is not a de Polignac number, because 19872957 - 2⁶ = 19872893 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 (19872907) 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, 254743 + ... + 254820.

It is an arithmetic number, because the mean of its divisors is an integer number (3566948).

Almost surely, 2^19872957 is an apocalyptic number.

It is an amenable number.

19872957 is a deficient number, since it is larger than the sum of its proper divisors (8662627).

19872957 is a wasteful number, since it uses less digits than its factorization.

19872957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509579.

The product of its digits is 317520, while the sum is 48.

The square root of 19872957 is about 4457.9094876410. The cubic root of 19872957 is about 270.8657941263.

The spelling of 19872957 in words is "nineteen million, eight hundred seventy-two thousand, nine hundred fifty-seven".