20705134 has 4 divisors (see below), whose sum is σ = 31057704. Its totient is φ = 10352566.

The previous prime is 20705131. The next prime is 20705137. The reversal of 20705134 is 43150702.

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

It is an interprime number because it is at equal distance from previous prime (20705131) and next prime (20705137).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20705131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5176282 + ... + 5176285.

It is an arithmetic number, because the mean of its divisors is an integer number (7764426).

Almost surely, 2^20705134 is an apocalyptic number.

20705134 is a deficient number, since it is larger than the sum of its proper divisors (10352570).

20705134 is a wasteful number, since it uses less digits than its factorization.

20705134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10352569.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20705134 is about 4550.2894413433. The cubic root of 20705134 is about 274.5950358998.

Adding to 20705134 its reverse (43150702), we get a palindrome (63855836).

The spelling of 20705134 in words is "twenty million, seven hundred five thousand, one hundred thirty-four".