20286934 has 4 divisors (see below), whose sum is σ = 30430404. Its totient is φ = 10143466.

The previous prime is 20286907. The next prime is 20286941. The reversal of 20286934 is 43968202.

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

It is a super-2 number, since 2×20286934² = 823119382240712, 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 20286934.

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, 5071732 + ... + 5071735.

It is an arithmetic number, because the mean of its divisors is an integer number (7607601).

Almost surely, 2^20286934 is an apocalyptic number.

20286934 is a deficient number, since it is larger than the sum of its proper divisors (10143470).

20286934 is a wasteful number, since it uses less digits than its factorization.

20286934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10143469.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 20286934 is about 4504.1019082610. The cubic root of 20286934 is about 272.7337007037.

The spelling of 20286934 in words is "twenty million, two hundred eighty-six thousand, nine hundred thirty-four".