20703042 has 48 divisors (see below), whose sum is σ = 49154040. Its totient is φ = 6268416.

The previous prime is 20703031. The next prime is 20703079. The reversal of 20703042 is 24030702.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18740241 + 1962801 = 4329^2 + 1401^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7708 + ... + 10040.

Almost surely, 2^20703042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20703042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24577020).

20703042 is an abundant number, since it is smaller than the sum of its proper divisors (28450998).

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

20703042 is a wasteful number, since it uses less digits than its factorization.

20703042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387 (or 2384 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20703042 is about 4550.0595600497. The cubic root of 20703042 is about 274.5857874342.

Adding to 20703042 its reverse (24030702), we get a palindrome (44733744).

The spelling of 20703042 in words is "twenty million, seven hundred three thousand, forty-two".