20910806012 has 6 divisors (see below), whose sum is σ = 36593910528. Its totient is φ = 10455403004.

The previous prime is 20910806011. The next prime is 20910806029. The reversal of 20910806012 is 21060801902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20910806011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2613850748 + ... + 2613850755.

It is an arithmetic number, because the mean of its divisors is an integer number (6098985088).

Almost surely, 2^20910806012 is an apocalyptic number.

It is an amenable number.

20910806012 is a deficient number, since it is larger than the sum of its proper divisors (15683104516).

20910806012 is a wasteful number, since it uses less digits than its factorization.

20910806012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227701507 (or 5227701505 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 20910806012 in words is "twenty billion, nine hundred ten million, eight hundred six thousand, twelve".