20421140010 has 32 divisors (see below), whose sum is σ = 51893721792. Its totient is φ = 5125305600.

The previous prime is 20421139913. The next prime is 20421140029. The reversal of 20421140010 is 1004112402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20020216 + ... + 20021235.

It is an arithmetic number, because the mean of its divisors is an integer number (1621678806).

Almost surely, 2^20421140010 is an apocalyptic number.

20421140010 is an abundant number, since it is smaller than the sum of its proper divisors (31472581782).

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

20421140010 is a wasteful number, since it uses less digits than its factorization.

20421140010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40041478.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20421140010 its reverse (1004112402), we get a palindrome (21425252412).

The spelling of 20421140010 in words is "twenty billion, four hundred twenty-one million, one hundred forty thousand, ten".