20074821 has 8 divisors (see below), whose sum is σ = 28825440. Its totient is φ = 12353712.

The previous prime is 20074801. The next prime is 20074843. The reversal of 20074821 is 12847002.

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

It is not a de Polignac number, because 20074821 - 2¹⁵ = 20042053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20074791 and 20074800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20074801) 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, 257331 + ... + 257408.

It is an arithmetic number, because the mean of its divisors is an integer number (3603180).

Almost surely, 2^20074821 is an apocalyptic number.

It is an amenable number.

20074821 is a deficient number, since it is larger than the sum of its proper divisors (8750619).

20074821 is a wasteful number, since it uses less digits than its factorization.

20074821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514755.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20074821 is about 4480.4933880099. The cubic root of 20074821 is about 271.7798328298.

The spelling of 20074821 in words is "twenty million, seventy-four thousand, eight hundred twenty-one".