20256445826 has 4 divisors (see below), whose sum is σ = 30384668742. Its totient is φ = 10128222912.

The previous prime is 20256445819. The next prime is 20256445841. The reversal of 20256445826 is 62854465202.

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: 62854465202 = 2 ⋅31427232601.

It can be written as a sum of positive squares in only one way, i.e., 20253559225 + 2886601 = 142315^2 + 1699^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5064111455 + ... + 5064111458.

Almost surely, 2^20256445826 is an apocalyptic number.

20256445826 is a deficient number, since it is larger than the sum of its proper divisors (10128222916).

20256445826 is a wasteful number, since it uses less digits than its factorization.

20256445826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10128222915.

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 20256445826 in words is "twenty billion, two hundred fifty-six million, four hundred forty-five thousand, eight hundred twenty-six".