20602421 has 8 divisors (see below), whose sum is σ = 23587200. Its totient is φ = 17628048.

The previous prime is 20602409. The next prime is 20602423. The reversal of 20602421 is 12420602.

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

It is a cyclic number.

It is not a de Polignac number, because 20602421 - 2⁶ = 20602357 is a prime.

It is a super-2 number, since 2×20602421² = 848919502122482, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20602421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20602423) 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, 2255 + ... + 6803.

It is an arithmetic number, because the mean of its divisors is an integer number (2948400).

Almost surely, 2^20602421 is an apocalyptic number.

It is an amenable number.

20602421 is a deficient number, since it is larger than the sum of its proper divisors (2984779).

20602421 is an equidigital number, since it uses as much as digits as its factorization.

20602421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20602421 is about 4538.9889843444. The cubic root of 20602421 is about 274.1402171844.

The spelling of 20602421 in words is "twenty million, six hundred two thousand, four hundred twenty-one".