20881442 has 16 divisors (see below), whose sum is σ = 32182272. Its totient is φ = 10156800.

The previous prime is 20881439. The next prime is 20881451. The reversal of 20881442 is 24418802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17567 + ... + 18717.

It is an arithmetic number, because the mean of its divisors is an integer number (2011392).

Almost surely, 2^20881442 is an apocalyptic number.

20881442 is a deficient number, since it is larger than the sum of its proper divisors (11300830).

20881442 is a wasteful number, since it uses less digits than its factorization.

20881442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393.

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 20881442 is about 4569.6216473577. The cubic root of 20881442 is about 275.3722430079.

The spelling of 20881442 in words is "twenty million, eight hundred eighty-one thousand, four hundred forty-two".