19727994 has 32 divisors (see below), whose sum is σ = 46355904. Its totient is φ = 5518080.

The previous prime is 19727977. The next prime is 19728017. The reversal of 19727994 is 49972791.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10639 + ... + 12354.

It is an arithmetic number, because the mean of its divisors is an integer number (1448622).

Almost surely, 2^19727994 is an apocalyptic number.

19727994 is an abundant number, since it is smaller than the sum of its proper divisors (26627910).

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

19727994 is a wasteful number, since it uses less digits than its factorization.

19727994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23022.

The product of its digits is 285768, while the sum is 48.

The square root of 19727994 is about 4441.6206501681. The cubic root of 19727994 is about 270.2055773163.

The spelling of 19727994 in words is "nineteen million, seven hundred twenty-seven thousand, nine hundred ninety-four".