20860534 has 4 divisors (see below), whose sum is σ = 31290804. Its totient is φ = 10430266.

The previous prime is 20860523. The next prime is 20860549. The reversal of 20860534 is 43506802.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5215132 + ... + 5215135.

It is an arithmetic number, because the mean of its divisors is an integer number (7822701).

Almost surely, 2^20860534 is an apocalyptic number.

20860534 is a deficient number, since it is larger than the sum of its proper divisors (10430270).

20860534 is a wasteful number, since it uses less digits than its factorization.

20860534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10430269.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20860534 is about 4567.3333576607. Note that the first 4 decimals coincide. The cubic root of 20860534 is about 275.2803048246.

The spelling of 20860534 in words is "twenty million, eight hundred sixty thousand, five hundred thirty-four".