20839354 has 4 divisors (see below), whose sum is σ = 31259034. Its totient is φ = 10419676.

The previous prime is 20839339. The next prime is 20839367. The reversal of 20839354 is 45393802.

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: 45393802 = 2 ⋅22696901.

It can be written as a sum of positive squares in only one way, i.e., 20657025 + 182329 = 4545^2 + 427^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5209837 + ... + 5209840.

Almost surely, 2^20839354 is an apocalyptic number.

20839354 is a deficient number, since it is larger than the sum of its proper divisors (10419680).

20839354 is a wasteful number, since it uses less digits than its factorization.

20839354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10419679.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 20839354 is about 4565.0141292224. The cubic root of 20839354 is about 275.1871079260.

The spelling of 20839354 in words is "twenty million, eight hundred thirty-nine thousand, three hundred fifty-four".