1921442374 has 16 divisors (see below), whose sum is σ = 3212319600. Its totient is φ = 856617984.

The previous prime is 1921442371. The next prime is 1921442377. The reversal of 1921442374 is 4732441291.

It is an interprime number because it is at equal distance from previous prime (1921442371) and next prime (1921442377).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921442371) 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, 1486539 + ... + 1487830.

It is an arithmetic number, because the mean of its divisors is an integer number (200769975).

Almost surely, 2^1921442374 is an apocalyptic number.

1921442374 is a deficient number, since it is larger than the sum of its proper divisors (1290877226).

1921442374 is a wasteful number, since it uses less digits than its factorization.

1921442374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974407.

The product of its digits is 48384, while the sum is 37.

The square root of 1921442374 is about 43834.2602766375. The cubic root of 1921442374 is about 1243.2041599893.

The spelling of 1921442374 in words is "one billion, nine hundred twenty-one million, four hundred forty-two thousand, three hundred seventy-four".