20674730 has 16 divisors (see below), whose sum is σ = 37825704. Its totient is φ = 8134080.

The previous prime is 20674729. The next prime is 20674733. The reversal of 20674730 is 3747602.

It can be written as a sum of positive squares in 4 ways, for example, as 13476241 + 7198489 = 3671^2 + 2683^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20674693 and 20674702.

It is not an unprimeable number, because it can be changed into a prime (20674733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16337 + ... + 17556.

Almost surely, 2^20674730 is an apocalyptic number.

20674730 is a deficient number, since it is larger than the sum of its proper divisors (17150974).

20674730 is a wasteful number, since it uses less digits than its factorization.

20674730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33961.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 20674730 is about 4546.9473276034. The cubic root of 20674730 is about 274.4605623704.

The spelling of 20674730 in words is "twenty million, six hundred seventy-four thousand, seven hundred thirty".