20629428 has 48 divisors (see below), whose sum is σ = 49889280. Its totient is φ = 6630624.

The previous prime is 20629417. The next prime is 20629429. The reversal of 20629428 is 82492602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20629429) 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, 44325 + ... + 44787.

It is an arithmetic number, because the mean of its divisors is an integer number (1039360).

Almost surely, 2^20629428 is an apocalyptic number.

It is an amenable number.

20629428 is an abundant number, since it is smaller than the sum of its proper divisors (29259852).

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

20629428 is a wasteful number, since it uses less digits than its factorization.

20629428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20629428 is about 4541.9630117384. The cubic root of 20629428 is about 274.2599518524.

The spelling of 20629428 in words is "twenty million, six hundred twenty-nine thousand, four hundred twenty-eight".