18970957 has 4 divisors (see below), whose sum is σ = 19077120. Its totient is φ = 18864796.

The previous prime is 18970951. The next prime is 18970961. The reversal of 18970957 is 75907981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18970957 - 2¹¹ = 18968909 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 (18970951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52813 + ... + 53170.

It is an arithmetic number, because the mean of its divisors is an integer number (4769280).

Almost surely, 2^18970957 is an apocalyptic number.

It is an amenable number.

18970957 is a deficient number, since it is larger than the sum of its proper divisors (106163).

18970957 is a wasteful number, since it uses less digits than its factorization.

18970957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106162.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 18970957 is about 4355.5662088872. The cubic root of 18970957 is about 266.7041334509.

The spelling of 18970957 in words is "eighteen million, nine hundred seventy thousand, nine hundred fifty-seven".