20671672776 has 32 divisors (see below), whose sum is σ = 52333353600. Its totient is φ = 6803334720.

The previous prime is 20671672771. The next prime is 20671672789. The reversal of 20671672776 is 67727617602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20671672771) 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, 5449495 + ... + 5453286.

It is an arithmetic number, because the mean of its divisors is an integer number (1635417300).

Almost surely, 2^20671672776 is an apocalyptic number.

It is an amenable number.

20671672776 is an abundant number, since it is smaller than the sum of its proper divisors (31661680824).

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

20671672776 is a wasteful number, since it uses less digits than its factorization.

20671672776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10902869 (or 10902865 counting only the distinct ones).

The product of its (nonzero) digits is 2074464, while the sum is 51.

The spelling of 20671672776 in words is "twenty billion, six hundred seventy-one million, six hundred seventy-two thousand, seven hundred seventy-six".