19902426 has 16 divisors (see below), whose sum is σ = 39852000. Its totient is φ = 6626288.

The previous prime is 19902413. The next prime is 19902451. The reversal of 19902426 is 62420991.

It is a super-2 number, since 2×19902426² = 792213121370952, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6025 + ... + 8723.

It is an arithmetic number, because the mean of its divisors is an integer number (2490750).

Almost surely, 2^19902426 is an apocalyptic number.

19902426 is an abundant number, since it is smaller than the sum of its proper divisors (19949574).

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

19902426 is a wasteful number, since it uses less digits than its factorization.

19902426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 19902426 is about 4461.2135120391. The cubic root of 19902426 is about 270.9996142022. Note that the first 3 decimals are identical.

The spelling of 19902426 in words is "nineteen million, nine hundred two thousand, four hundred twenty-six".