20331377 has 8 divisors (see below), whose sum is σ = 22298112. Its totient is φ = 18384400.

The previous prime is 20331373. The next prime is 20331403. The reversal of 20331377 is 77313302.

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 20331377 - 2² = 20331373 is a prime.

It is a super-2 number, since 2×20331377² = 826729781432258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331373) 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, 2738 + ... + 6939.

It is an arithmetic number, because the mean of its divisors is an integer number (2787264).

Almost surely, 2^20331377 is an apocalyptic number.

It is an amenable number.

20331377 is a deficient number, since it is larger than the sum of its proper divisors (1966735).

20331377 is a wasteful number, since it uses less digits than its factorization.

20331377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9879.

The product of its (nonzero) digits is 2646, while the sum is 26.

The square root of 20331377 is about 4509.0328231229. The cubic root of 20331377 is about 272.9327165383.

Adding to 20331377 its reverse (77313302), we get a palindrome (97644679).

The spelling of 20331377 in words is "twenty million, three hundred thirty-one thousand, three hundred seventy-seven".