20408166980 has 24 divisors (see below), whose sum is σ = 43036479360. Its totient is φ = 8129108960.

The previous prime is 20408166973. The next prime is 20408166991. The reversal of 20408166980 is 8966180402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2129966 + ... + 2139525.

It is an arithmetic number, because the mean of its divisors is an integer number (1793186640).

Almost surely, 2^20408166980 is an apocalyptic number.

20408166980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20408166980 is an abundant number, since it is smaller than the sum of its proper divisors (22628312380).

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

20408166980 is a wasteful number, since it uses less digits than its factorization.

20408166980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4269739 (or 4269737 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 20408166980 in words is "twenty billion, four hundred eight million, one hundred sixty-six thousand, nine hundred eighty".