20021254 has 16 divisors (see below), whose sum is σ = 33016896. Its totient is φ = 9029800.

The previous prime is 20021251. The next prime is 20021263. The reversal of 20021254 is 45212002.

It is a super-2 number, since 2×20021254² = 801701223465032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592 + ... + 6355.

It is an arithmetic number, because the mean of its divisors is an integer number (2063556).

Almost surely, 2^20021254 is an apocalyptic number.

20021254 is a deficient number, since it is larger than the sum of its proper divisors (12995642).

20021254 is a wasteful number, since it uses less digits than its factorization.

20021254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7091.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20021254 is about 4474.5115934591. The cubic root of 20021254 is about 271.5378813388.

Adding to 20021254 its reverse (45212002), we get a palindrome (65233256).

The spelling of 20021254 in words is "twenty million, twenty-one thousand, two hundred fifty-four".