20260006644 has 12 divisors (see below), whose sum is σ = 47273348864. Its totient is φ = 6753335544.

The previous prime is 20260006643. The next prime is 20260006661. The reversal of 20260006644 is 44660006202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20260006643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844166932 + ... + 844166955.

Almost surely, 2^20260006644 is an apocalyptic number.

It is an amenable number.

20260006644 is an abundant number, since it is smaller than the sum of its proper divisors (27013342220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20260006644 is a wasteful number, since it uses less digits than its factorization.

20260006644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688333894 (or 1688333892 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 20260006644 in words is "twenty billion, two hundred sixty million, six thousand, six hundred forty-four".