20842370 has 16 divisors (see below), whose sum is σ = 39147840. Its totient is φ = 7974384.

The previous prime is 20842361. The next prime is 20842397. The reversal of 20842370 is 7324802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45080 + ... + 45539.

It is an arithmetic number, because the mean of its divisors is an integer number (2446740).

Almost surely, 2^20842370 is an apocalyptic number.

20842370 is a deficient number, since it is larger than the sum of its proper divisors (18305470).

20842370 is a wasteful number, since it uses less digits than its factorization.

20842370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90649.

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

The square root of 20842370 is about 4565.3444557886. The cubic root of 20842370 is about 275.2003828782.

It can be divided in two parts, 20842 and 370, that added together give a palindrome (21212).

The spelling of 20842370 in words is "twenty million, eight hundred forty-two thousand, three hundred seventy".