1901142020 has 12 divisors (see below), whose sum is σ = 3992398284. Its totient is φ = 760456800.

The previous prime is 1901142017. The next prime is 1901142041. The reversal of 1901142020 is 202411091.

It can be written as a sum of positive squares in 2 ways, for example, as 941753344 + 959388676 = 30688^2 + 30974^2 .

It is a super-2 number, since 2×1901142020² = 7228681960419360800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 95057101 = 1901142020 / (1 + 9 + 0 + 1 + 1 + 4 + 2 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1901141983 and 1901142001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47528531 + ... + 47528570.

It is an arithmetic number, because the mean of its divisors is an integer number (332699857).

Almost surely, 2^1901142020 is an apocalyptic number.

1901142020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1901142020 is an abundant number, since it is smaller than the sum of its proper divisors (2091256264).

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

1901142020 is a wasteful number, since it uses less digits than its factorization.

1901142020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95057110 (or 95057108 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1901142020 is about 43602.0873353559. The cubic root of 1901142020 is about 1238.8104313236.

The spelling of 1901142020 in words is "one billion, nine hundred one million, one hundred forty-two thousand, twenty".