19420631 has 8 divisors (see below), whose sum is σ = 20114784. Its totient is φ = 18738720.

The previous prime is 19420591. The next prime is 19420637. The reversal of 19420631 is 13602491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19420631 - 2⁶ = 19420567 is a prime.

It is a super-2 number, since 2×19420631² = 754321816876322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19420631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420637) 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 7 ways as a sum of consecutive naturals, for example, 230 + ... + 6236.

It is an arithmetic number, because the mean of its divisors is an integer number (2514348).

Almost surely, 2^19420631 is an apocalyptic number.

19420631 is a deficient number, since it is larger than the sum of its proper divisors (694153).

19420631 is an equidigital number, since it uses as much as digits as its factorization.

19420631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6121.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 19420631 is about 4406.8845004152. The cubic root of 19420631 is about 268.7949543693.

The spelling of 19420631 in words is "nineteen million, four hundred twenty thousand, six hundred thirty-one".