20402227966 has 24 divisors (see below), whose sum is σ = 32158543320. Its totient is φ = 9704669040.

The previous prime is 20402227961. The next prime is 20402227991. The reversal of 20402227966 is 66972220402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402227961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23440 + ... + 203356.

It is an arithmetic number, because the mean of its divisors is an integer number (1339939305).

Almost surely, 2^20402227966 is an apocalyptic number.

20402227966 is a deficient number, since it is larger than the sum of its proper divisors (11756315354).

20402227966 is a wasteful number, since it uses less digits than its factorization.

20402227966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180040 (or 180009 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 20402227966 in words is "twenty billion, four hundred two million, two hundred twenty-seven thousand, nine hundred sixty-six".