20614421 has 4 divisors (see below), whose sum is σ = 21827052. Its totient is φ = 19401792.

The previous prime is 20614409. The next prime is 20614427. The reversal of 20614421 is 12441602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10817521 + 9796900 = 3289^2 + 3130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20614421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20614393 and 20614402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20614427) 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, 606290 + ... + 606323.

It is an arithmetic number, because the mean of its divisors is an integer number (5456763).

Almost surely, 2^20614421 is an apocalyptic number.

It is an amenable number.

20614421 is a deficient number, since it is larger than the sum of its proper divisors (1212631).

20614421 is a wasteful number, since it uses less digits than its factorization.

20614421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212630.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20614421 is about 4540.3106721897. The cubic root of 20614421 is about 274.1934317090.

The spelling of 20614421 in words is "twenty million, six hundred fourteen thousand, four hundred twenty-one".