20629973 has 32 divisors (see below), whose sum is σ = 26836992. Its totient is φ = 15422400.

The previous prime is 20629969. The next prime is 20629997. The reversal of 20629973 is 37992602.

It is not a de Polignac number, because 20629973 - 2² = 20629969 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20629913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200240 + ... + 200342.

It is an arithmetic number, because the mean of its divisors is an integer number (838656).

Almost surely, 2^20629973 is an apocalyptic number.

It is an amenable number.

20629973 is a deficient number, since it is larger than the sum of its proper divisors (6207019).

20629973 is a wasteful number, since it uses less digits than its factorization.

20629973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 20629973 is about 4542.0230074274. The cubic root of 20629973 is about 274.2623670164.

The spelling of 20629973 in words is "twenty million, six hundred twenty-nine thousand, nine hundred seventy-three".