1918632196 has 12 divisors (see below), whose sum is σ = 3615883852. Its totient is φ = 885522528.

The previous prime is 1918632181. The next prime is 1918632211. The reversal of 1918632196 is 6912368191.

It is an interprime number because it is at equal distance from previous prime (1918632181) and next prime (1918632211).

It can be written as a sum of positive squares in 2 ways, for example, as 768065796 + 1150566400 = 27714^2 + 33920^2 .

It is a super-2 number, since 2×1918632196² = 7362299007055564832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18448335 + ... + 18448438.

Almost surely, 2^1918632196 is an apocalyptic number.

It is an amenable number.

1918632196 is a deficient number, since it is larger than the sum of its proper divisors (1697251656).

1918632196 is a wasteful number, since it uses less digits than its factorization.

1918632196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36896790 (or 36896788 counting only the distinct ones).

The product of its digits is 139968, while the sum is 46.

The square root of 1918632196 is about 43802.1939633165. The cubic root of 1918632196 is about 1242.5977874718.

The spelling of 1918632196 in words is "one billion, nine hundred eighteen million, six hundred thirty-two thousand, one hundred ninety-six".