1942791021 has 16 divisors (see below), whose sum is σ = 3029694400. Its totient is φ = 1227025584.

The previous prime is 1942791001. The next prime is 1942791023. The reversal of 1942791021 is 1201972491.

It is not a de Polignac number, because 1942791021 - 2¹⁰ = 1942789997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942791023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1893046 + ... + 1894071.

It is an arithmetic number, because the mean of its divisors is an integer number (189355900).

Almost surely, 2^1942791021 is an apocalyptic number.

It is an amenable number.

1942791021 is a deficient number, since it is larger than the sum of its proper divisors (1086903379).

1942791021 is a wasteful number, since it uses less digits than its factorization.

1942791021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787145 (or 3787139 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1942791021 is about 44077.1031375702. The cubic root of 1942791021 is about 1247.7915181978.

The spelling of 1942791021 in words is "one billion, nine hundred forty-two million, seven hundred ninety-one thousand, twenty-one".