20842373 has 4 divisors (see below), whose sum is σ = 21939360. Its totient is φ = 19745388.

The previous prime is 20842361. The next prime is 20842397. The reversal of 20842373 is 37324802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20842373 - 2¹⁴ = 20825989 is a prime.

It is a super-2 number, since 2×20842373² = 868809024542258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20842343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548465 + ... + 548502.

It is an arithmetic number, because the mean of its divisors is an integer number (5484840).

Almost surely, 2^20842373 is an apocalyptic number.

It is an amenable number.

20842373 is a deficient number, since it is larger than the sum of its proper divisors (1096987).

20842373 is a wasteful number, since it uses less digits than its factorization.

20842373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096986.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20842373 is about 4565.3447843509. The cubic root of 20842373 is about 275.2003960821.

The spelling of 20842373 in words is "twenty million, eight hundred forty-two thousand, three hundred seventy-three".