20667562512 has 40 divisors (see below), whose sum is σ = 56201268960. Its totient is φ = 6526598400.

The previous prime is 20667562499. The next prime is 20667562519. The reversal of 20667562512 is 21526576602.

It is not an unprimeable number, because it can be changed into a prime (20667562519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11329989 + ... + 11331812.

It is an arithmetic number, because the mean of its divisors is an integer number (1405031724).

Almost surely, 2^20667562512 is an apocalyptic number.

It is an amenable number.

20667562512 is an abundant number, since it is smaller than the sum of its proper divisors (35533706448).

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

20667562512 is a wasteful number, since it uses less digits than its factorization.

20667562512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22661831 (or 22661825 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 20667562512 in words is "twenty billion, six hundred sixty-seven million, five hundred sixty-two thousand, five hundred twelve".