19145868 has 36 divisors (see below), whose sum is σ = 51968952. Its totient is φ = 5470080.

The previous prime is 19145857. The next prime is 19145869. The reversal of 19145868 is 86854191.

It is a super-2 number, since 2×19145868² = 733128522946848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (19145869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15693 + ... + 16868.

It is an arithmetic number, because the mean of its divisors is an integer number (1443582).

Almost surely, 2^19145868 is an apocalyptic number.

It is an amenable number.

19145868 is an abundant number, since it is smaller than the sum of its proper divisors (32823084).

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

19145868 is a wasteful number, since it uses less digits than its factorization.

19145868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32582 (or 32573 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 19145868 is about 4375.5991589724. The cubic root of 19145868 is about 267.5212921591.

The spelling of 19145868 in words is "nineteen million, one hundred forty-five thousand, eight hundred sixty-eight".