1913021922 has 32 divisors (see below), whose sum is σ = 4437891072. Its totient is φ = 538419024.

The previous prime is 1913021899. The next prime is 1913021923. The reversal of 1913021922 is 2291203191.

It is a self number, because there is not a number n which added to its sum of digits gives 1913021922.

It is not an unprimeable number, because it can be changed into a prime (1913021923) 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, 337098 + ... + 342725.

It is an arithmetic number, because the mean of its divisors is an integer number (138684096).

Almost surely, 2^1913021922 is an apocalyptic number.

1913021922 is an abundant number, since it is smaller than the sum of its proper divisors (2524869150).

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

1913021922 is a wasteful number, since it uses less digits than its factorization.

1913021922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679902.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1913021922 is about 43738.1060632488. The cubic root of 1913021922 is about 1241.3854446240.

The spelling of 1913021922 in words is "one billion, nine hundred thirteen million, twenty-one thousand, nine hundred twenty-two".