18940933407 has 8 divisors (see below), whose sum is σ = 27550448640. Its totient is φ = 11479353560.

The previous prime is 18940933399. The next prime is 18940933409. The reversal of 18940933407 is 70433904981.

It is a happy number.

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 18940933407 - 2³ = 18940933399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18940933409) 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, 286983807 + ... + 286983872.

It is an arithmetic number, because the mean of its divisors is an integer number (3443806080).

Almost surely, 2^18940933407 is an apocalyptic number.

18940933407 is a deficient number, since it is larger than the sum of its proper divisors (8609515233).

18940933407 is a wasteful number, since it uses less digits than its factorization.

18940933407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573967693.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 18940933407 in words is "eighteen billion, nine hundred forty million, nine hundred thirty-three thousand, four hundred seven".