20671450 has 12 divisors (see below), whose sum is σ = 38448990. Its totient is φ = 8268560.

The previous prime is 20671423. The next prime is 20671471. The reversal of 20671450 is 5417602.

It can be written as a sum of positive squares in 3 ways, for example, as 9840769 + 10830681 = 3137^2 + 3291^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206665 + ... + 206764.

Almost surely, 2^20671450 is an apocalyptic number.

20671450 is a deficient number, since it is larger than the sum of its proper divisors (17777540).

20671450 is a wasteful number, since it uses less digits than its factorization.

20671450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413441 (or 413436 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20671450 is about 4546.5866317491. The cubic root of 20671450 is about 274.4460474165.

The spelling of 20671450 in words is "twenty million, six hundred seventy-one thousand, four hundred fifty".