20621674 has 8 divisors (see below), whose sum is σ = 30996000. Its totient is φ = 10289676.

The previous prime is 20621609. The next prime is 20621677. The reversal of 20621674 is 47612602.

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

It is a super-3 number, since 3×20621674³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20621677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9334 + ... + 11329.

It is an arithmetic number, because the mean of its divisors is an integer number (3874500).

Almost surely, 2^20621674 is an apocalyptic number.

20621674 is a deficient number, since it is larger than the sum of its proper divisors (10374326).

20621674 is a wasteful number, since it uses less digits than its factorization.

20621674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21164.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20621674 is about 4541.1093358341. The cubic root of 20621674 is about 274.2255854420.

The spelling of 20621674 in words is "twenty million, six hundred twenty-one thousand, six hundred seventy-four".