20807342 has 4 divisors (see below), whose sum is σ = 31211016. Its totient is φ = 10403670.

The previous prime is 20807329. The next prime is 20807359. The reversal of 20807342 is 24370802.

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

It is a super-2 number, since 2×20807342² = 865890962209928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5201834 + ... + 5201837.

It is an arithmetic number, because the mean of its divisors is an integer number (7802754).

Almost surely, 2^20807342 is an apocalyptic number.

20807342 is a deficient number, since it is larger than the sum of its proper divisors (10403674).

20807342 is a wasteful number, since it uses less digits than its factorization.

20807342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10403673.

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

The square root of 20807342 is about 4561.5065493760. The cubic root of 20807342 is about 275.0461277994.

The spelling of 20807342 in words is "twenty million, eight hundred seven thousand, three hundred forty-two".