20854937 has 8 divisors (see below), whose sum is σ = 22621032. Its totient is φ = 19148800.

The previous prime is 20854931. The next prime is 20854943. The reversal of 20854937 is 73945802.

It is an interprime number because it is at equal distance from previous prime (20854931) and next prime (20854943).

It can be written as a sum of positive squares in 4 ways, for example, as 2157961 + 18696976 = 1469^2 + 4324^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20854937 - 2⁴ = 20854921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20854937.

It is not an unprimeable number, because it can be changed into a prime (20854931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14264 + ... + 15657.

It is an arithmetic number, because the mean of its divisors is an integer number (2827629).

Almost surely, 2^20854937 is an apocalyptic number.

It is an amenable number.

20854937 is a deficient number, since it is larger than the sum of its proper divisors (1766095).

20854937 is a wasteful number, since it uses less digits than its factorization.

20854937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29979.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 20854937 is about 4566.7205957886. The cubic root of 20854937 is about 275.2556828648.

The spelling of 20854937 in words is "twenty million, eight hundred fifty-four thousand, nine hundred thirty-seven".