20012421510 has 24 divisors (see below), whose sum is σ = 52032296160. Its totient is φ = 5336645712.

The previous prime is 20012421491. The next prime is 20012421557. The reversal of 20012421510 is 1512421002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111180030 + ... + 111180209.

It is an arithmetic number, because the mean of its divisors is an integer number (2168012340).

Almost surely, 2^20012421510 is an apocalyptic number.

20012421510 is an abundant number, since it is smaller than the sum of its proper divisors (32019874650).

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

20012421510 is a wasteful number, since it uses less digits than its factorization.

20012421510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222360252 (or 222360249 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 20012421510 its reverse (1512421002), we get a palindrome (21524842512).

The spelling of 20012421510 in words is "twenty billion, twelve million, four hundred twenty-one thousand, five hundred ten".