20701340 has 48 divisors (see below), whose sum is σ = 48111840. Its totient is φ = 7418880.

The previous prime is 20701339. The next prime is 20701349. The reversal of 20701340 is 4310702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20701349) 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 in 15 ways as a sum of consecutive naturals, for example, 15416 + ... + 16704.

It is an arithmetic number, because the mean of its divisors is an integer number (1002330).

Almost surely, 2^20701340 is an apocalyptic number.

20701340 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 20701340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24055920).

20701340 is an abundant number, since it is smaller than the sum of its proper divisors (27410500).

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

20701340 is a wasteful number, since it uses less digits than its factorization.

20701340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20701340 is about 4549.8725256868. The cubic root of 20701340 is about 274.5782626492.

The spelling of 20701340 in words is "twenty million, seven hundred one thousand, three hundred forty".