19742454 has 20 divisors (see below), whose sum is σ = 44238084. Its totient is φ = 6580764.

The previous prime is 19742453. The next prime is 19742477. The reversal of 19742454 is 45424791.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19742453) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 60772 + ... + 61095.

Almost surely, 2^19742454 is an apocalyptic number.

19742454 is an abundant number, since it is smaller than the sum of its proper divisors (24495630).

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

19742454 is a wasteful number, since it uses less digits than its factorization.

19742454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121881 (or 121872 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 19742454 is about 4443.2481362175. The cubic root of 19742454 is about 270.2715785938.

The spelling of 19742454 in words is "nineteen million, seven hundred forty-two thousand, four hundred fifty-four".