20883478 has 16 divisors (see below), whose sum is σ = 39055104. Its totient is φ = 8136360.

The previous prime is 20883469. The next prime is 20883479. The reversal of 20883478 is 87438802.

It is a super-2 number, since 2×20883478² = 872239306752968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20883478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20883479) 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, 67650 + ... + 67957.

It is an arithmetic number, because the mean of its divisors is an integer number (2440944).

Almost surely, 2^20883478 is an apocalyptic number.

20883478 is a deficient number, since it is larger than the sum of its proper divisors (18171626).

20883478 is a wasteful number, since it uses less digits than its factorization.

20883478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135627.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 20883478 is about 4569.8444174829. The cubic root of 20883478 is about 275.3811925760.

The spelling of 20883478 in words is "twenty million, eight hundred eighty-three thousand, four hundred seventy-eight".