1945138202 has 12 divisors (see below), whose sum is σ = 3394067850. Its totient is φ = 833630616.

The previous prime is 1945138159. The next prime is 1945138219. The reversal of 1945138202 is 2028315491.

It can be written as a sum of positive squares in only one way, i.e., 1369666081 + 575472121 = 37009^2 + 23989^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9924077 + ... + 9924272.

Almost surely, 2^1945138202 is an apocalyptic number.

1945138202 is a deficient number, since it is larger than the sum of its proper divisors (1448929648).

1945138202 is a wasteful number, since it uses less digits than its factorization.

1945138202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19848365 (or 19848358 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 1945138202 is about 44103.7209541327. The cubic root of 1945138202 is about 1248.2938219848.

The spelling of 1945138202 in words is "one billion, nine hundred forty-five million, one hundred thirty-eight thousand, two hundred two".