20433516 has 48 divisors (see below), whose sum is σ = 50077440. Its totient is φ = 6475840.

The previous prime is 20433481. The next prime is 20433533. The reversal of 20433516 is 61533402.

It is a happy number.

It is a super-2 number, since 2×20433516² = 835057152244512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24295 + ... + 25121.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^20433516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20433516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25038720).

20433516 is an abundant number, since it is smaller than the sum of its proper divisors (29643924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20433516 is a wasteful number, since it uses less digits than its factorization.

20433516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 932 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20433516 is about 4520.3446771236. The cubic root of 20433516 is about 273.3889985115.

Adding to 20433516 its reverse (61533402), we get a palindrome (81966918).

The spelling of 20433516 in words is "twenty million, four hundred thirty-three thousand, five hundred sixteen".