20514782 has 4 divisors (see below), whose sum is σ = 30772176. Its totient is φ = 10257390.

The previous prime is 20514757. The next prime is 20514787. The reversal of 20514782 is 28741502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28741502 = 2 ⋅14370751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20514787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5128694 + ... + 5128697.

It is an arithmetic number, because the mean of its divisors is an integer number (7693044).

Almost surely, 2^20514782 is an apocalyptic number.

20514782 is a deficient number, since it is larger than the sum of its proper divisors (10257394).

20514782 is a wasteful number, since it uses less digits than its factorization.

20514782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10257393.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 20514782 is about 4529.3246737234. The cubic root of 20514782 is about 273.7509502827.

The spelling of 20514782 in words is "twenty million, five hundred fourteen thousand, seven hundred eighty-two".