20716340 has 24 divisors (see below), whose sum is σ = 43841952. Its totient is φ = 8222240.

The previous prime is 20716313. The next prime is 20716343. The reversal of 20716340 is 4361702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20716343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334 + ... + 6573.

It is an arithmetic number, because the mean of its divisors is an integer number (1826748).

Almost surely, 2^20716340 is an apocalyptic number.

20716340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20716340 is an abundant number, since it is smaller than the sum of its proper divisors (23125612).

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

20716340 is a wasteful number, since it uses less digits than its factorization.

20716340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8047 (or 8045 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20716340 is about 4551.5206250219. The cubic root of 20716340 is about 274.6445655963.

The spelling of 20716340 in words is "twenty million, seven hundred sixteen thousand, three hundred forty".