20850647122 has 4 divisors (see below), whose sum is σ = 31275970686. Its totient is φ = 10425323560.

The previous prime is 20850647093. The next prime is 20850647131. The reversal of 20850647122 is 22174605802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22174605802 = 2 ⋅11087302901.

It can be written as a sum of positive squares in only one way, i.e., 18471256281 + 2379390841 = 135909^2 + 48779^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5212661779 + ... + 5212661782.

Almost surely, 2^20850647122 is an apocalyptic number.

20850647122 is a deficient number, since it is larger than the sum of its proper divisors (10425323564).

20850647122 is a wasteful number, since it uses less digits than its factorization.

20850647122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10425323563.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 20850647122 in words is "twenty billion, eight hundred fifty million, six hundred forty-seven thousand, one hundred twenty-two".