20052742 has 16 divisors (see below), whose sum is σ = 31209552. Its totient is φ = 9655200.

The previous prime is 20052719. The next prime is 20052751. The reversal of 20052742 is 24725002.

It is a super-2 number, since 2×20052742² = 804224923437128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6133 + ... + 8815.

It is an arithmetic number, because the mean of its divisors is an integer number (1950597).

Almost surely, 2^20052742 is an apocalyptic number.

20052742 is a deficient number, since it is larger than the sum of its proper divisors (11156810).

20052742 is a wasteful number, since it uses less digits than its factorization.

20052742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 20052742 is about 4478.0288074107. The cubic root of 20052742 is about 271.6801585799.

Adding to 20052742 its reverse (24725002), we get a palindrome (44777744).

The spelling of 20052742 in words is "twenty million, fifty-two thousand, seven hundred forty-two".