1920192021 has 16 divisors (see below), whose sum is σ = 3103341120. Its totient is φ = 1163752560.

The previous prime is 1920192017. The next prime is 1920192059. The reversal of 1920192021 is 1202910291.

It is not a de Polignac number, because 1920192021 - 2² = 1920192017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920192011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3232350 + ... + 3232943.

It is an arithmetic number, because the mean of its divisors is an integer number (193958820).

Almost surely, 2^1920192021 is an apocalyptic number.

1920192021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1920192021 is a deficient number, since it is larger than the sum of its proper divisors (1183149099).

1920192021 is a wasteful number, since it uses less digits than its factorization.

1920192021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6465313 (or 6465307 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1920192021 is about 43819.9956754904. The cubic root of 1920192021 is about 1242.9344352985.

The spelling of 1920192021 in words is "one billion, nine hundred twenty million, one hundred ninety-two thousand, twenty-one".