19892020 has 24 divisors (see below), whose sum is σ = 41887944. Its totient is φ = 7934976.

The previous prime is 19892017. The next prime is 19892021. The reversal of 19892020 is 2029891.

It can be written as a sum of positive squares in 4 ways, for example, as 142884 + 19749136 = 378^2 + 4444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19892021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7512 + ... + 9808.

It is an arithmetic number, because the mean of its divisors is an integer number (1745331).

Almost surely, 2^19892020 is an apocalyptic number.

19892020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19892020 is an abundant number, since it is smaller than the sum of its proper divisors (21995924).

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

19892020 is a wasteful number, since it uses less digits than its factorization.

19892020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739 (or 2737 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 19892020 is about 4460.0470849533. The cubic root of 19892020 is about 270.9523751770.

The spelling of 19892020 in words is "nineteen million, eight hundred ninety-two thousand, twenty".