19426420 has 24 divisors (see below), whose sum is σ = 43934184. Its totient is φ = 7172736.

The previous prime is 19426409. The next prime is 19426423. The reversal of 19426420 is 2462491.

It can be written as a sum of positive squares in 4 ways, for example, as 381924 + 19044496 = 618^2 + 4364^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19426423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37099 + ... + 37618.

It is an arithmetic number, because the mean of its divisors is an integer number (1830591).

Almost surely, 2^19426420 is an apocalyptic number.

19426420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19426420 is an abundant number, since it is smaller than the sum of its proper divisors (24507764).

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

19426420 is a wasteful number, since it uses less digits than its factorization.

19426420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74739 (or 74737 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 19426420 is about 4407.5412646962. The cubic root of 19426420 is about 268.8216596362.

The spelling of 19426420 in words is "nineteen million, four hundred twenty-six thousand, four hundred twenty".