20421762 has 32 divisors (see below), whose sum is σ = 41731200. Its totient is φ = 6661248.

The previous prime is 20421749. The next prime is 20421767. The reversal of 20421762 is 26712402.

It is not an unprimeable number, because it can be changed into a prime (20421767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89064 + ... + 89292.

It is an arithmetic number, because the mean of its divisors is an integer number (1304100).

Almost surely, 2^20421762 is an apocalyptic number.

20421762 is an abundant number, since it is smaller than the sum of its proper divisors (21309438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20421762 is a wasteful number, since it uses less digits than its factorization.

20421762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20421762 is about 4519.0443680053. The cubic root of 20421762 is about 273.3365678115.

The spelling of 20421762 in words is "twenty million, four hundred twenty-one thousand, seven hundred sixty-two".