20551673 has 16 divisors (see below), whose sum is σ = 22809600. Its totient is φ = 18429840.

The previous prime is 20551637. The next prime is 20551697. The reversal of 20551673 is 37615502.

It is a cyclic number.

It is not a de Polignac number, because 20551673 - 2⁸ = 20551417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20551603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57068 + ... + 57426.

It is an arithmetic number, because the mean of its divisors is an integer number (1425600).

Almost surely, 2^20551673 is an apocalyptic number.

20551673 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20551673 is a deficient number, since it is larger than the sum of its proper divisors (2257927).

20551673 is a wasteful number, since it uses less digits than its factorization.

20551673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 20551673 is about 4533.3953059490. The cubic root of 20551673 is about 273.9149442071.

The spelling of 20551673 in words is "twenty million, five hundred fifty-one thousand, six hundred seventy-three".