20587934 has 4 divisors (see below), whose sum is σ = 30881904. Its totient is φ = 10293966.

The previous prime is 20587933. The next prime is 20587951. The reversal of 20587934 is 43978502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5146982 + ... + 5146985.

It is an arithmetic number, because the mean of its divisors is an integer number (7720476).

Almost surely, 2^20587934 is an apocalyptic number.

20587934 is a deficient number, since it is larger than the sum of its proper divisors (10293970).

20587934 is a wasteful number, since it uses less digits than its factorization.

20587934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10293969.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 20587934 is about 4537.3928637490. The cubic root of 20587934 is about 274.0759464116.

The spelling of 20587934 in words is "twenty million, five hundred eighty-seven thousand, nine hundred thirty-four".