19900746 has 24 divisors (see below), whose sum is σ = 44285124. Its totient is φ = 6454080.

The previous prime is 19900739. The next prime is 19900747. The reversal of 19900746 is 64700991.

It can be written as a sum of positive squares in 2 ways, for example, as 19900521 + 225 = 4461^2 + 15^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19900746.

It is not an unprimeable number, because it can be changed into a prime (19900747) by changing a digit.

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, 14275 + ... + 15606.

Almost surely, 2^19900746 is an apocalyptic number.

19900746 is an abundant number, since it is smaller than the sum of its proper divisors (24384378).

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

19900746 is a wasteful number, since it uses less digits than its factorization.

19900746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29926 (or 29923 counting only the distinct ones).

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

The square root of 19900746 is about 4461.0252184896. The cubic root of 19900746 is about 270.9919887975.

The spelling of 19900746 in words is "nineteen million, nine hundred thousand, seven hundred forty-six".