20691130 has 8 divisors (see below), whose sum is σ = 37244052. Its totient is φ = 8276448.

The previous prime is 20691113. The next prime is 20691131. The reversal of 20691130 is 3119602.

It can be written as a sum of positive squares in 2 ways, for example, as 19864849 + 826281 = 4457^2 + 909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20691131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034547 + ... + 1034566.

Almost surely, 2^20691130 is an apocalyptic number.

20691130 is a deficient number, since it is larger than the sum of its proper divisors (16552922).

20691130 is a wasteful number, since it uses less digits than its factorization.

20691130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069120.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20691130 is about 4548.7503778510. The cubic root of 20691130 is about 274.5331141213.

The spelling of 20691130 in words is "twenty million, six hundred ninety-one thousand, one hundred thirty".