20377481 has 8 divisors (see below), whose sum is σ = 21546720. Its totient is φ = 19217952.

The previous prime is 20377453. The next prime is 20377499. The reversal of 20377481 is 18477302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20377481 - 2¹⁰ = 20376457 is a prime.

It is a super-2 number, since 2×20377481² = 830483463810722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20377411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126 + ... + 6728.

It is an arithmetic number, because the mean of its divisors is an integer number (2693340).

Almost surely, 2^20377481 is an apocalyptic number.

It is an amenable number.

20377481 is a deficient number, since it is larger than the sum of its proper divisors (1169239).

20377481 is a wasteful number, since it uses less digits than its factorization.

20377481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 20377481 is about 4514.1423327139. The cubic root of 20377481 is about 273.1388640858.

The spelling of 20377481 in words is "twenty million, three hundred seventy-seven thousand, four hundred eighty-one".