20755342 has 4 divisors (see below), whose sum is σ = 31133016. Its totient is φ = 10377670.

The previous prime is 20755321. The next prime is 20755367. The reversal of 20755342 is 24355702.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20755342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5188834 + ... + 5188837.

It is an arithmetic number, because the mean of its divisors is an integer number (7783254).

Almost surely, 2^20755342 is an apocalyptic number.

20755342 is a deficient number, since it is larger than the sum of its proper divisors (10377674).

20755342 is a wasteful number, since it uses less digits than its factorization.

20755342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377673.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 20755342 is about 4555.8031125149. The cubic root of 20755342 is about 274.8168124344.

The spelling of 20755342 in words is "twenty million, seven hundred fifty-five thousand, three hundred forty-two".