20980534 has 8 divisors (see below), whose sum is σ = 31585248. Its totient is φ = 10452120.

The previous prime is 20980513. The next prime is 20980537. The reversal of 20980534 is 43508902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20980496 and 20980505.

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 in 3 ways as a sum of consecutive naturals, for example, 18382 + ... + 19489.

It is an arithmetic number, because the mean of its divisors is an integer number (3948156).

Almost surely, 2^20980534 is an apocalyptic number.

20980534 is a deficient number, since it is larger than the sum of its proper divisors (10604714).

20980534 is a wasteful number, since it uses less digits than its factorization.

20980534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38150.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20980534 is about 4580.4512878100. The cubic root of 20980534 is about 275.8071449070.

The spelling of 20980534 in words is "twenty million, nine hundred eighty thousand, five hundred thirty-four".