18998442070 has 32 divisors (see below), whose sum is σ = 35879060736. Its totient is φ = 7233667200.

The previous prime is 18998442013. The next prime is 18998442077. The reversal of 18998442070 is 7024489981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18998441999 and 18998442017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18998442077) 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, 483429 + ... + 521248.

It is an arithmetic number, because the mean of its divisors is an integer number (1121220648).

Almost surely, 2^18998442070 is an apocalyptic number.

18998442070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18998442070 is a deficient number, since it is larger than the sum of its proper divisors (16880618666).

18998442070 is a wasteful number, since it uses less digits than its factorization.

18998442070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004776.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 18998442070 in words is "eighteen billion, nine hundred ninety-eight million, four hundred forty-two thousand, seventy".