201320023970 has 16 divisors (see below), whose sum is σ = 390251123640. Its totient is φ = 74333547264.

The previous prime is 201320023943. The next prime is 201320023979. The reversal of 201320023970 is 79320023102.

It is a Cunningham number, because it is equal to 448687²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 72475639369 + 128844384601 = 269213^2 + 358949^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201320023979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774307655 + ... + 774307914.

Almost surely, 2^201320023970 is an apocalyptic number.

201320023970 is a deficient number, since it is larger than the sum of its proper divisors (188931099670).

201320023970 is a wasteful number, since it uses less digits than its factorization.

201320023970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548615589.

The product of its (nonzero) digits is 4536, while the sum is 29.

The spelling of 201320023970 in words is "two hundred one billion, three hundred twenty million, twenty-three thousand, nine hundred seventy".