18970994 has 8 divisors (see below), whose sum is σ = 32521728. Its totient is φ = 8130420.

The previous prime is 18970967. The next prime is 18971003. The reversal of 18970994 is 49907981.

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

It is a super-2 number, since 2×18970994² = 719797226696072, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677522 + ... + 677549.

It is an arithmetic number, because the mean of its divisors is an integer number (4065216).

Almost surely, 2^18970994 is an apocalyptic number.

18970994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18970994 is a deficient number, since it is larger than the sum of its proper divisors (13550734).

18970994 is a wasteful number, since it uses less digits than its factorization.

18970994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355080.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 18970994 is about 4355.5704563237. The cubic root of 18970994 is about 266.7043068396.

The spelling of 18970994 in words is "eighteen million, nine hundred seventy thousand, nine hundred ninety-four".