20134428 has 24 divisors (see below), whose sum is σ = 47322240. Its totient is φ = 6662640.

The previous prime is 20134423. The next prime is 20134463. The reversal of 20134428 is 82443102.

It is a junction number, because it is equal to n+sod(n) for n = 20134398 and 20134407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20134423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4368 + ... + 7703.

It is an arithmetic number, because the mean of its divisors is an integer number (1971760).

Almost surely, 2^20134428 is an apocalyptic number.

It is an amenable number.

20134428 is an abundant number, since it is smaller than the sum of its proper divisors (27187812).

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

20134428 is a wasteful number, since it uses less digits than its factorization.

20134428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12217 (or 12215 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20134428 is about 4487.1402919900. The cubic root of 20134428 is about 272.0485603899.

It can be divided in two parts, 2013 and 4428, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 20134428 in words is "twenty million, one hundred thirty-four thousand, four hundred twenty-eight".