20156243266 has 8 divisors (see below), whose sum is σ = 30251917584. Its totient is φ = 10072270740.

The previous prime is 20156243251. The next prime is 20156243287. The reversal of 20156243266 is 66234265102.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2921140 + ... + 2928031.

It is an arithmetic number, because the mean of its divisors is an integer number (3781489698).

Almost surely, 2^20156243266 is an apocalyptic number.

20156243266 is a deficient number, since it is larger than the sum of its proper divisors (10095674318).

20156243266 is a wasteful number, since it uses less digits than its factorization.

20156243266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850896.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 20156243266 in words is "twenty billion, one hundred fifty-six million, two hundred forty-three thousand, two hundred sixty-six".