18950979 has 8 divisors (see below), whose sum is σ = 25884432. Its totient is φ = 12325760.

The previous prime is 18950963. The next prime is 18950989. The reversal of 18950979 is 97905981.

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

It is a cyclic number.

It is not a de Polignac number, because 18950979 - 2⁴ = 18950963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18950929) 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, 76914 + ... + 77159.

It is an arithmetic number, because the mean of its divisors is an integer number (3235554).

Almost surely, 2^18950979 is an apocalyptic number.

18950979 is a deficient number, since it is larger than the sum of its proper divisors (6933453).

18950979 is a wasteful number, since it uses less digits than its factorization.

18950979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154117.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 18950979 is about 4353.2722175394. The cubic root of 18950979 is about 266.6104800026.

The spelling of 18950979 in words is "eighteen million, nine hundred fifty thousand, nine hundred seventy-nine".