20380946 has 4 divisors (see below), whose sum is σ = 30571422. Its totient is φ = 10190472.

The previous prime is 20380937. The next prime is 20380951. The reversal of 20380946 is 64908302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15295921 + 5085025 = 3911^2 + 2255^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5095235 + ... + 5095238.

Almost surely, 2^20380946 is an apocalyptic number.

20380946 is a deficient number, since it is larger than the sum of its proper divisors (10190476).

20380946 is a wasteful number, since it uses less digits than its factorization.

20380946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10190475.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20380946 is about 4514.5261102357. The cubic root of 20380946 is about 273.1543447779.

The spelling of 20380946 in words is "twenty million, three hundred eighty thousand, nine hundred forty-six".