19400141 has 4 divisors (see below), whose sum is σ = 20025984. Its totient is φ = 18774300.

The previous prime is 19400113. The next prime is 19400149. The reversal of 19400141 is 14100491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14100491 = 53 ⋅266047.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19400141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19400149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312875 + ... + 312936.

It is an arithmetic number, because the mean of its divisors is an integer number (5006496).

Almost surely, 2^19400141 is an apocalyptic number.

It is an amenable number.

19400141 is a deficient number, since it is larger than the sum of its proper divisors (625843).

19400141 is an equidigital number, since it uses as much as digits as its factorization.

19400141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625842.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 19400141 is about 4404.5591152804. The cubic root of 19400141 is about 268.7003891839.

The spelling of 19400141 in words is "nineteen million, four hundred thousand, one hundred forty-one".