20194020 has 288 divisors, whose sum is σ = 80510976. Its totient is φ = 3974400.

The previous prime is 20193991. The next prime is 20194037. The reversal of 20194020 is 2049102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20193984 and 20194002.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 429637 + ... + 429683.

It is an arithmetic number, because the mean of its divisors is an integer number (279552).

Almost surely, 2^20194020 is an apocalyptic number.

20194020 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 20194020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40255488).

20194020 is an abundant number, since it is smaller than the sum of its proper divisors (60316956).

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

20194020 is a wasteful number, since it uses less digits than its factorization.

20194020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20194020 is about 4493.7756953368. The cubic root of 20194020 is about 272.3166906771.

The spelling of 20194020 in words is "twenty million, one hundred ninety-four thousand, twenty".