20587434 has 32 divisors (see below), whose sum is σ = 47523840. Its totient is φ = 5823792.

The previous prime is 20587433. The next prime is 20587447. The reversal of 20587434 is 43478502.

It is a junction number, because it is equal to n+sod(n) for n = 20587395 and 20587404.

It is not an unprimeable number, because it can be changed into a prime (20587433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1947 + ... + 6705.

It is an arithmetic number, because the mean of its divisors is an integer number (1485120).

Almost surely, 2^20587434 is an apocalyptic number.

20587434 is an abundant number, since it is smaller than the sum of its proper divisors (26936406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20587434 is a wasteful number, since it uses less digits than its factorization.

20587434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 20587434 is about 4537.3377656948. The cubic root of 20587434 is about 274.0737276511.

The spelling of 20587434 in words is "twenty million, five hundred eighty-seven thousand, four hundred thirty-four".