18950630465 has 32 divisors (see below), whose sum is σ = 25616666880. Its totient is φ = 13353474816.

The previous prime is 18950630423. The next prime is 18950630471. The reversal of 18950630465 is 56403605981.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18950630465 - 2⁶ = 18950630401 is a prime.

It is a super-2 number, since 2×18950630465² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 611279 + ... + 641531.

It is an arithmetic number, because the mean of its divisors is an integer number (800520840).

Almost surely, 2^18950630465 is an apocalyptic number.

It is an amenable number.

18950630465 is a deficient number, since it is larger than the sum of its proper divisors (6666036415).

18950630465 is a wasteful number, since it uses less digits than its factorization.

18950630465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30713.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 18950630465 in words is "eighteen billion, nine hundred fifty million, six hundred thirty thousand, four hundred sixty-five".