20605461 has 8 divisors (see below), whose sum is σ = 27523104. Its totient is φ = 13712400.

The previous prime is 20605397. The next prime is 20605463. The reversal of 20605461 is 16450602.

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

It is not a de Polignac number, because 20605461 - 2⁶ = 20605397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20605463) 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, 4090 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (3440388).

Almost surely, 2^20605461 is an apocalyptic number.

It is an amenable number.

20605461 is a deficient number, since it is larger than the sum of its proper divisors (6917643).

20605461 is a wasteful number, since it uses less digits than its factorization.

20605461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12291.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20605461 is about 4539.3238483281. The cubic root of 20605461 is about 274.1537001512.

The spelling of 20605461 in words is "twenty million, six hundred five thousand, four hundred sixty-one".