19740906 has 24 divisors (see below), whose sum is σ = 43929444. Its totient is φ = 6402240.

The previous prime is 19740887. The next prime is 19740937. The reversal of 19740906 is 60904791.

It can be written as a sum of positive squares in 2 ways, for example, as 15139881 + 4601025 = 3891^2 + 2145^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14155 + ... + 15486.

Almost surely, 2^19740906 is an apocalyptic number.

19740906 is an abundant number, since it is smaller than the sum of its proper divisors (24188538).

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

19740906 is a wasteful number, since it uses less digits than its factorization.

19740906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29686 (or 29683 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 19740906 is about 4443.0739359142. The cubic root of 19740906 is about 270.2645144376.

The spelling of 19740906 in words is "nineteen million, seven hundred forty thousand, nine hundred six".