19207940 has 24 divisors (see below), whose sum is σ = 40756632. Its totient is φ = 7603200.

The previous prime is 19207931. The next prime is 19207961. The reversal of 19207940 is 4970291.

It can be written as a sum of positive squares in 4 ways, for example, as 5914624 + 13293316 = 2432^2 + 3646^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19207897 and 19207906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3011 + ... + 6890.

It is an arithmetic number, because the mean of its divisors is an integer number (1698193).

Almost surely, 2^19207940 is an apocalyptic number.

19207940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19207940 is an abundant number, since it is smaller than the sum of its proper divisors (21548692).

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

19207940 is a wasteful number, since it uses less digits than its factorization.

19207940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10007 (or 10005 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 19207940 is about 4382.6863907882. The cubic root of 19207940 is about 267.8100867349.

The spelling of 19207940 in words is "nineteen million, two hundred seven thousand, nine hundred forty".