20399266276 has 9 divisors (see below), whose sum is σ = 35699215881. Its totient is φ = 10199490312.

The previous prime is 20399266253. The next prime is 20399266291. The reversal of 20399266276 is 67266299302.

The square root of 20399266276 is 142826.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10243464100 + 10155802176 = 101210^2 + 100776^2 .

It is a super-2 number, since 2×20399266276² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 249946 + ... + 321358.

Almost surely, 2^20399266276 is an apocalyptic number.

20399266276 is the 142826-th square number.

It is an amenable number.

20399266276 is a deficient number, since it is larger than the sum of its proper divisors (15299949605).

20399266276 is an frugal number, since it uses more digits than its factorization.

20399266276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142830 (or 71415 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 52.

The spelling of 20399266276 in words is "twenty billion, three hundred ninety-nine million, two hundred sixty-six thousand, two hundred seventy-six".