20426542 has 8 divisors (see below), whose sum is σ = 30672576. Its totient is φ = 10202352.

The previous prime is 20426533. The next prime is 20426557. The reversal of 20426542 is 24562402.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2878 + ... + 7009.

It is an arithmetic number, because the mean of its divisors is an integer number (3834072).

Almost surely, 2^20426542 is an apocalyptic number.

20426542 is a deficient number, since it is larger than the sum of its proper divisors (10246034).

20426542 is a wasteful number, since it uses less digits than its factorization.

20426542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10922.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 20426542 is about 4519.5732099392. The cubic root of 20426542 is about 273.3578922345.

Adding to 20426542 its reverse (24562402), we get a palindrome (44988944).

The spelling of 20426542 in words is "twenty million, four hundred twenty-six thousand, five hundred forty-two".