1918986970 has 32 divisors (see below), whose sum is σ = 3538080000. Its totient is φ = 749046336.

The previous prime is 1918986967. The next prime is 1918987033. The reversal of 1918986970 is 796898191.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158181 + ... + 169879.

It is an arithmetic number, because the mean of its divisors is an integer number (110565000).

Almost surely, 2^1918986970 is an apocalyptic number.

1918986970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1918986970 is a deficient number, since it is larger than the sum of its proper divisors (1619093030).

1918986970 is a wasteful number, since it uses less digits than its factorization.

1918986970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12102.

The product of its (nonzero) digits is 1959552, while the sum is 58.

The square root of 1918986970 is about 43806.2435047791. The cubic root of 1918986970 is about 1242.6743722769.

The spelling of 1918986970 in words is "one billion, nine hundred eighteen million, nine hundred eighty-six thousand, nine hundred seventy".