20704546 has 4 divisors (see below), whose sum is σ = 31056822. Its totient is φ = 10352272.

The previous prime is 20704529. The next prime is 20704561. The reversal of 20704546 is 64540702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64540702 = 2 ⋅32270351.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 8767521 = 3455^2 + 2961^2 .

It is a super-2 number, since 2×20704546² = 857356450132232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5176135 + ... + 5176138.

Almost surely, 2^20704546 is an apocalyptic number.

20704546 is a deficient number, since it is larger than the sum of its proper divisors (10352276).

20704546 is a wasteful number, since it uses less digits than its factorization.

20704546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10352275.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20704546 is about 4550.2248296101. The cubic root of 20704546 is about 274.5924364896.

The spelling of 20704546 in words is "twenty million, seven hundred four thousand, five hundred forty-six".