1897513981022 has 8 divisors (see below), whose sum is σ = 3105022878072. Its totient is φ = 862506355000.

The previous prime is 1897513981021. The next prime is 1897513981049. The reversal of 1897513981022 is 2201893157981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897513981021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43125317729 + ... + 43125317772.

It is an arithmetic number, because the mean of its divisors is an integer number (388127859759).

Almost surely, 2^{1897513981022} is an apocalyptic number.

1897513981022 is a deficient number, since it is larger than the sum of its proper divisors (1207508897050).

1897513981022 is a wasteful number, since it uses less digits than its factorization.

1897513981022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86250635514.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 1897513981022 in words is "one trillion, eight hundred ninety-seven billion, five hundred thirteen million, nine hundred eighty-one thousand, twenty-two".