20642134 has 8 divisors (see below), whose sum is σ = 31125888. Its totient is φ = 10266840.

The previous prime is 20642129. The next prime is 20642161. The reversal of 20642134 is 43124602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26637 + ... + 27400.

It is an arithmetic number, because the mean of its divisors is an integer number (3890736).

Almost surely, 2^20642134 is an apocalyptic number.

20642134 is a deficient number, since it is larger than the sum of its proper divisors (10483754).

20642134 is a wasteful number, since it uses less digits than its factorization.

20642134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54230.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20642134 is about 4543.3615308492. The cubic root of 20642134 is about 274.3162473502.

Adding to 20642134 its reverse (43124602), we get a palindrome (63766736).

The spelling of 20642134 in words is "twenty million, six hundred forty-two thousand, one hundred thirty-four".