20677234 has 4 divisors (see below), whose sum is σ = 31015854. Its totient is φ = 10338616.

The previous prime is 20677213. The next prime is 20677247. The reversal of 20677234 is 43277602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43277602 = 2 ⋅21638801.

It can be written as a sum of positive squares in only one way, i.e., 20675209 + 2025 = 4547^2 + 45^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20677196 and 20677205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5169307 + ... + 5169310.

Almost surely, 2^20677234 is an apocalyptic number.

20677234 is a deficient number, since it is larger than the sum of its proper divisors (10338620).

20677234 is a wasteful number, since it uses less digits than its factorization.

20677234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10338619.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20677234 is about 4547.2226688386. Note that the first 3 decimals coincide. The cubic root of 20677234 is about 274.4716422653.

The spelling of 20677234 in words is "twenty million, six hundred seventy-seven thousand, two hundred thirty-four".