20628134 has 4 divisors (see below), whose sum is σ = 30942204. Its totient is φ = 10314066.

The previous prime is 20628103. The next prime is 20628137. The reversal of 20628134 is 43182602.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×20628134³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5157032 + ... + 5157035.

It is an arithmetic number, because the mean of its divisors is an integer number (7735551).

Almost surely, 2^20628134 is an apocalyptic number.

20628134 is a deficient number, since it is larger than the sum of its proper divisors (10314070).

20628134 is a wasteful number, since it uses less digits than its factorization.

20628134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10314069.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20628134 is about 4541.8205600838. The cubic root of 20628134 is about 274.2542173292.

The spelling of 20628134 in words is "twenty million, six hundred twenty-eight thousand, one hundred thirty-four".