20602546 has 4 divisors (see below), whose sum is σ = 30903822. Its totient is φ = 10301272.

The previous prime is 20602523. The next prime is 20602577. The reversal of 20602546 is 64520602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64520602 = 2 ⋅32260301.

It can be written as a sum of positive squares in only one way, i.e., 20602521 + 25 = 4539^2 + 5^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20602546.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5150635 + ... + 5150638.

Almost surely, 2^20602546 is an apocalyptic number.

20602546 is a deficient number, since it is larger than the sum of its proper divisors (10301276).

20602546 is a wasteful number, since it uses less digits than its factorization.

20602546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10301275.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20602546 is about 4539.0027539097. The cubic root of 20602546 is about 274.1407716089.

Subtracting from 20602546 its sum of digits (25), we obtain a square (20602521 = 4539²).

The spelling of 20602546 in words is "twenty million, six hundred two thousand, five hundred forty-six".