20980532 has 6 divisors (see below), whose sum is σ = 36715938. Its totient is φ = 10490264.

The previous prime is 20980513. The next prime is 20980537. The reversal of 20980532 is 23508902.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 4301476 = 4084^2 + 2074^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20980495 and 20980504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20980537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2622563 + ... + 2622570.

It is an arithmetic number, because the mean of its divisors is an integer number (6119323).

Almost surely, 2^20980532 is an apocalyptic number.

It is an amenable number.

20980532 is a deficient number, since it is larger than the sum of its proper divisors (15735406).

20980532 is a wasteful number, since it uses less digits than its factorization.

20980532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5245137 (or 5245135 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20980532 is about 4580.4510694909. The cubic root of 20980532 is about 275.8071361430.

It can be divided in two parts, 20980 and 532, that added together give a palindrome (21512).

The spelling of 20980532 in words is "twenty million, nine hundred eighty thousand, five hundred thirty-two".