20042051 has 2 divisors, whose sum is σ = 20042052. Its totient is φ = 20042050.

The previous prime is 20042047. The next prime is 20042053. The reversal of 20042051 is 15024002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20042051 - 2² = 20042047 is a prime.

Together with 20042053, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20042053) 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 as a sum of consecutive naturals, namely, 10021025 + 10021026.

It is an arithmetic number, because the mean of its divisors is an integer number (10021026).

Almost surely, 2^20042051 is an apocalyptic number.

20042051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042051 is an equidigital number, since it uses as much as digits as its factorization.

20042051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20042051 is about 4476.8349310646. The cubic root of 20042051 is about 271.6318684440.

Adding to 20042051 its reverse (15024002), we get a palindrome (35066053).

The spelling of 20042051 in words is "twenty million, forty-two thousand, fifty-one".