1890200020 has 24 divisors (see below), whose sum is σ = 4061733984. Its totient is φ = 738496416.

The previous prime is 1890200017. The next prime is 1890200027. The reversal of 1890200020 is 200020981.

It is a super-2 number, since 2×1890200020² = 7145712231216000800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1890199964 and 1890200000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890200027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1098094 + ... + 1099813.

It is an arithmetic number, because the mean of its divisors is an integer number (169238916).

Almost surely, 2^1890200020 is an apocalyptic number.

1890200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1890200020 is an abundant number, since it is smaller than the sum of its proper divisors (2171533964).

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

1890200020 is a wasteful number, since it uses less digits than its factorization.

1890200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197959 (or 2197957 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1890200020 is about 43476.4306262600. The cubic root of 1890200020 is about 1236.4292042498.

The spelling of 1890200020 in words is "one billion, eight hundred ninety million, two hundred thousand, twenty".