20881454 has 12 divisors (see below), whose sum is σ = 34428912. Its totient is φ = 9491460.

The previous prime is 20881451. The next prime is 20881463. The reversal of 20881454 is 45418802.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20881454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20881451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42902 + ... + 43385.

It is an arithmetic number, because the mean of its divisors is an integer number (2869076).

Almost surely, 2^20881454 is an apocalyptic number.

20881454 is a deficient number, since it is larger than the sum of its proper divisors (13547458).

20881454 is a wasteful number, since it uses less digits than its factorization.

20881454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86311 (or 86300 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 20881454 is about 4569.6229603765. The cubic root of 20881454 is about 275.3722957575.

The spelling of 20881454 in words is "twenty million, eight hundred eighty-one thousand, four hundred fifty-four".