201209947930 has 32 divisors (see below), whose sum is σ = 383530294224. Its totient is φ = 75740184576.

The previous prime is 201209947903. The next prime is 201209948021. The reversal of 201209947930 is 39749902102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 179419169241 + 21790778689 = 423579^2 + 147617^2 .

It is a super-2 number, since 2×201209947930² (a number of 23 digits) contains 22 as substring.

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, 1377694 + ... + 1516726.

Almost surely, 2^201209947930 is an apocalyptic number.

201209947930 is a deficient number, since it is larger than the sum of its proper divisors (182320346294).

201209947930 is a wasteful number, since it uses less digits than its factorization.

201209947930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147570.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 201209947930 in words is "two hundred one billion, two hundred nine million, nine hundred forty-seven thousand, nine hundred thirty".