19926340 has 36 divisors (see below), whose sum is σ = 48679596. Its totient is φ = 6831552.

The previous prime is 19926331. The next prime is 19926371. The reversal of 19926340 is 4362991.

It can be written as a sum of positive squares in 2 ways, for example, as 14394436 + 5531904 = 3794^2 + 2352^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19926296 and 19926305.

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, 9187 + ... + 11146.

It is an arithmetic number, because the mean of its divisors is an integer number (1352211).

Almost surely, 2^19926340 is an apocalyptic number.

19926340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19926340 is an abundant number, since it is smaller than the sum of its proper divisors (28753256).

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

19926340 is a wasteful number, since it uses less digits than its factorization.

19926340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20356 (or 20347 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 19926340 is about 4463.8929198627. The cubic root of 19926340 is about 271.1081117100.

The spelling of 19926340 in words is "nineteen million, nine hundred twenty-six thousand, three hundred forty".