21050142204 has 48 divisors (see below), whose sum is σ = 60451693568. Its totient is φ = 5551685568.

The previous prime is 21050142187. The next prime is 21050142221. The reversal of 21050142204 is 40224105012.

It is an interprime number because it is at equal distance from previous prime (21050142187) and next prime (21050142221).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9637252 + ... + 9639435.

Almost surely, 2^21050142204 is an apocalyptic number.

It is an amenable number.

21050142204 is an abundant number, since it is smaller than the sum of its proper divisors (39401551364).

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

21050142204 is a wasteful number, since it uses less digits than its factorization.

21050142204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19276714 (or 19276712 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 21050142204 its reverse (40224105012), we get a palindrome (61274247216).

The spelling of 21050142204 in words is "twenty-one billion, fifty million, one hundred forty-two thousand, two hundred four".