20342078 has 4 divisors (see below), whose sum is σ = 30513120. Its totient is φ = 10171038.

The previous prime is 20342059. The next prime is 20342083. The reversal of 20342078 is 87024302.

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

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, 5085518 + ... + 5085521.

It is an arithmetic number, because the mean of its divisors is an integer number (7628280).

Almost surely, 2^20342078 is an apocalyptic number.

20342078 is a deficient number, since it is larger than the sum of its proper divisors (10171042).

20342078 is a wasteful number, since it uses less digits than its factorization.

20342078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10171041.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20342078 is about 4510.2192851346. The cubic root of 20342078 is about 272.9805923042.

The spelling of 20342078 in words is "twenty million, three hundred forty-two thousand, seventy-eight".