19426931 has 4 divisors (see below), whose sum is σ = 19449864. Its totient is φ = 19404000.

The previous prime is 19426921. The next prime is 19426951. The reversal of 19426931 is 13962491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19426931 - 2⁶ = 19426867 is a prime.

It is a super-2 number, since 2×19426931² = 754811296157522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19426891 and 19426900.

It is not an unprimeable number, because it can be changed into a prime (19426921) 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 3 ways as a sum of consecutive naturals, for example, 10145 + ... + 11906.

It is an arithmetic number, because the mean of its divisors is an integer number (4862466).

Almost surely, 2^19426931 is an apocalyptic number.

19426931 is a deficient number, since it is larger than the sum of its proper divisors (22933).

19426931 is an equidigital number, since it uses as much as digits as its factorization.

19426931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22932.

The product of its digits is 11664, while the sum is 35.

The square root of 19426931 is about 4407.5992331427. The cubic root of 19426931 is about 268.8240166782.

The spelling of 19426931 in words is "nineteen million, four hundred twenty-six thousand, nine hundred thirty-one".