19813068 has 36 divisors (see below), whose sum is σ = 54637128. Its totient is φ = 6003840.

The previous prime is 19813049. The next prime is 19813099. The reversal of 19813068 is 86031891.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×19813068³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24621 + ... + 25412.

It is an arithmetic number, because the mean of its divisors is an integer number (1517698).

Almost surely, 2^19813068 is an apocalyptic number.

19813068 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19813068 is an abundant number, since it is smaller than the sum of its proper divisors (34824060).

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

19813068 is a wasteful number, since it uses less digits than its factorization.

19813068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50054 (or 50049 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 19813068 is about 4451.1872573506. The cubic root of 19813068 is about 270.5934272735.

The spelling of 19813068 in words is "nineteen million, eight hundred thirteen thousand, sixty-eight".