20167980 has 96 divisors (see below), whose sum is σ = 66662400. Its totient is φ = 4458240.

The previous prime is 20167969. The next prime is 20167991. The reversal of 20167980 is 8976102.

It is an interprime number because it is at equal distance from previous prime (20167969) and next prime (20167991).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12246 + ... + 13794.

It is an arithmetic number, because the mean of its divisors is an integer number (694400).

Almost surely, 2^20167980 is an apocalyptic number.

20167980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20167980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33331200).

20167980 is an abundant number, since it is smaller than the sum of its proper divisors (46494420).

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

20167980 is a wasteful number, since it uses less digits than its factorization.

20167980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 20167980 is about 4490.8774198368. The cubic root of 20167980 is about 272.1995903872.

The spelling of 20167980 in words is "twenty million, one hundred sixty-seven thousand, nine hundred eighty".