20677631712 has 24 divisors (see below), whose sum is σ = 54278783496. Its totient is φ = 6892543872.

The previous prime is 20677631699. The next prime is 20677631713. The reversal of 20677631712 is 21713677602.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20677631713) 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, 107695903 + ... + 107696094.

It is an arithmetic number, because the mean of its divisors is an integer number (2261615979).

Almost surely, 2^20677631712 is an apocalyptic number.

It is an amenable number.

20677631712 is an abundant number, since it is smaller than the sum of its proper divisors (33601151784).

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

20677631712 is a wasteful number, since it uses less digits than its factorization.

20677631712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215392010 (or 215392002 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 42.

The spelling of 20677631712 in words is "twenty billion, six hundred seventy-seven million, six hundred thirty-one thousand, seven hundred twelve".