20194980 has 96 divisors (see below), whose sum is σ = 64520064. Its totient is φ = 4675584.

The previous prime is 20194973. The next prime is 20195009. The reversal of 20194980 is 8949102.

It is a super-3 number, since 3×20194980³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 12499 + ... + 14021.

It is an arithmetic number, because the mean of its divisors is an integer number (672084).

Almost surely, 2^20194980 is an apocalyptic number.

20194980 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 20194980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32260032).

20194980 is an abundant number, since it is smaller than the sum of its proper divisors (44325084).

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

20194980 is a wasteful number, since it uses less digits than its factorization.

20194980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 20194980 is about 4493.8825084775. The cubic root of 20194980 is about 272.3210058140.

It can be divided in two parts, 20 and 194980, that added together give a triangular number (195000 = T₆₂₄).

The spelling of 20194980 in words is "twenty million, one hundred ninety-four thousand, nine hundred eighty".