20993126 has 16 divisors (see below), whose sum is σ = 39260160. Its totient is φ = 8179080.

The previous prime is 20993123. The next prime is 20993131. The reversal of 20993126 is 62139902.

It is a super-2 number, since 2×20993126² = 881422678503752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20993092 and 20993101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20993123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68006 + ... + 68313.

It is an arithmetic number, because the mean of its divisors is an integer number (2453760).

Almost surely, 2^20993126 is an apocalyptic number.

20993126 is a deficient number, since it is larger than the sum of its proper divisors (18267034).

20993126 is a wasteful number, since it uses less digits than its factorization.

20993126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136339.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 20993126 is about 4581.8256186808. The cubic root of 20993126 is about 275.8623114247.

It can be divided in two parts, 2099 and 3126, that added together give a palindrome (5225).

The spelling of 20993126 in words is "twenty million, nine hundred ninety-three thousand, one hundred twenty-six".