18903350407 has 16 divisors (see below), whose sum is σ = 20015218944. Its totient is φ = 17824032000.

The previous prime is 18903350399. The next prime is 18903350437. The reversal of 18903350407 is 70405330981.

It is a cyclic number.

It is not a de Polignac number, because 18903350407 - 2³ = 18903350399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18903350407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18903350437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1003657 + ... + 1022317.

It is an arithmetic number, because the mean of its divisors is an integer number (1250951184).

Almost surely, 2^18903350407 is an apocalyptic number.

18903350407 is a deficient number, since it is larger than the sum of its proper divisors (1111868537).

18903350407 is a wasteful number, since it uses less digits than its factorization.

18903350407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19530.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 18903350407 in words is "eighteen billion, nine hundred three million, three hundred fifty thousand, four hundred seven".