20713000 has 128 divisors (see below), whose sum is σ = 60652800. Its totient is φ = 6432000.

The previous prime is 20712997. The next prime is 20713003. The reversal of 20713000 is 31702.

It is an interprime number because it is at equal distance from previous prime (20712997) and next prime (20713003).

It is not an unprimeable number, because it can be changed into a prime (20713003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76866 + ... + 77134.

It is an arithmetic number, because the mean of its divisors is an integer number (473850).

Almost surely, 2^20713000 is an apocalyptic number.

20713000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20713000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30326400).

20713000 is an abundant number, since it is smaller than the sum of its proper divisors (39939800).

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

20713000 is a wasteful number, since it uses less digits than its factorization.

20713000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 20713000 is about 4551.1536998875. The cubic root of 20713000 is about 274.6298049106.

Adding to 20713000 its reverse (31702), we get a palindrome (20744702).

The spelling of 20713000 in words is "twenty million, seven hundred thirteen thousand".