50021660 has 24 divisors (see below), whose sum is σ = 113126496. Its totient is φ = 18469440.

The previous prime is 50021651. The next prime is 50021663. The reversal of 50021660 is 6612005.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50021663) 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, 95936 + ... + 96455.

It is an arithmetic number, because the mean of its divisors is an integer number (4713604).

Almost surely, 2^50021660 is an apocalyptic number.

It is an amenable number.

50021660 is an abundant number, since it is smaller than the sum of its proper divisors (63104836).

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

50021660 is a wasteful number, since it uses less digits than its factorization.

50021660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192413 (or 192411 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 50021660 is about 7072.5992393179. The cubic root of 50021660 is about 368.4563395990.

Adding to 50021660 its reverse (6612005), we get a palindrome (56633665).

The spelling of 50021660 in words is "fifty million, twenty-one thousand, six hundred sixty".