20707542 has 64 divisors (see below), whose sum is σ = 48384000. Its totient is φ = 6557760.

The previous prime is 20707517. The next prime is 20707543. The reversal of 20707542 is 24570702.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20707543) 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, 103959 + ... + 104157.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

Almost surely, 2^20707542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20707542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24192000).

20707542 is an abundant number, since it is smaller than the sum of its proper divisors (27676458).

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

20707542 is a wasteful number, since it uses less digits than its factorization.

20707542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20707542 is about 4550.5540322031. The cubic root of 20707542 is about 274.6056805901.

The spelling of 20707542 in words is "twenty million, seven hundred seven thousand, five hundred forty-two".