20374581 has 16 divisors (see below), whose sum is σ = 28038528. Its totient is φ = 13152000.

The previous prime is 20374579. The next prime is 20374583. The reversal of 20374581 is 18547302.

It is an interprime number because it is at equal distance from previous prime (20374579) and next prime (20374583).

It is not a de Polignac number, because 20374581 - 2¹ = 20374579 is a prime.

It is a super-2 number, since 2×20374581² = 830247101851122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20374583) 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 15 ways as a sum of consecutive naturals, for example, 18025 + ... + 19121.

It is an arithmetic number, because the mean of its divisors is an integer number (1752408).

Almost surely, 2^20374581 is an apocalyptic number.

It is an amenable number.

20374581 is a deficient number, since it is larger than the sum of its proper divisors (7663947).

20374581 is a wasteful number, since it uses less digits than its factorization.

20374581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20374581 is about 4513.8211085509. The cubic root of 20374581 is about 273.1259063134.

The spelling of 20374581 in words is "twenty million, three hundred seventy-four thousand, five hundred eighty-one".