20629896 has 128 divisors (see below), whose sum is σ = 64972800. Its totient is φ = 5322240.

The previous prime is 20629883. The next prime is 20629901. The reversal of 20629896 is 69892602.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 73276 + ... + 73556.

It is an arithmetic number, because the mean of its divisors is an integer number (507600).

Almost surely, 2^20629896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20629896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32486400).

20629896 is an abundant number, since it is smaller than the sum of its proper divisors (44342904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20629896 is a wasteful number, since it uses less digits than its factorization.

20629896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 20629896 is about 4542.0145310203. The cubic root of 20629896 is about 274.2620257940.

The spelling of 20629896 in words is "twenty million, six hundred twenty-nine thousand, eight hundred ninety-six".