20877633 has 12 divisors (see below), whose sum is σ = 34464768. Its totient is φ = 11930040.

The previous prime is 20877631. The next prime is 20877643. The reversal of 20877633 is 33677802.

It is not a de Polignac number, because 20877633 - 2¹ = 20877631 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20877631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165633 + ... + 165758.

It is an arithmetic number, because the mean of its divisors is an integer number (2872064).

Almost surely, 2^20877633 is an apocalyptic number.

It is an amenable number.

20877633 is a deficient number, since it is larger than the sum of its proper divisors (13587135).

20877633 is a wasteful number, since it uses less digits than its factorization.

20877633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331404 (or 331401 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20877633 is about 4569.2048542389. The cubic root of 20877633 is about 275.3554983684.

It can be divided in two parts, 208 and 77633, that added together give a square (77841 = 279²).

The spelling of 20877633 in words is "twenty million, eight hundred seventy-seven thousand, six hundred thirty-three".