19426937 has 6 divisors (see below), whose sum is σ = 20588958. Its totient is φ = 18267072.

The previous prime is 19426921. The next prime is 19426951. The reversal of 19426937 is 73962491.

It can be written as a sum of positive squares in 3 ways, for example, as 4596736 + 14830201 = 2144^2 + 3851^2 .

It is not a de Polignac number, because 19426937 - 2⁴ = 19426921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19426894 and 19426903.

It is not an unprimeable number, because it can be changed into a prime (19426997) 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 5 ways as a sum of consecutive naturals, for example, 17639 + ... + 18707.

It is an arithmetic number, because the mean of its divisors is an integer number (3431493).

Almost surely, 2^19426937 is an apocalyptic number.

19426937 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

19426937 is a deficient number, since it is larger than the sum of its proper divisors (1162021).

19426937 is an frugal number, since it uses more digits than its factorization.

19426937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155 (or 1086 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The square root of 19426937 is about 4407.5999137853. The cubic root of 19426937 is about 268.8240443536.

The spelling of 19426937 in words is "nineteen million, four hundred twenty-six thousand, nine hundred thirty-seven".