20421012112 has 20 divisors (see below), whose sum is σ = 39596116480. Its totient is φ = 10202659488.

The previous prime is 20421012103. The next prime is 20421012127. The reversal of 20421012112 is 21121012402.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468912 + ... + 510607.

It is an arithmetic number, because the mean of its divisors is an integer number (1979805824).

Almost surely, 2^20421012112 is an apocalyptic number.

It is an amenable number.

20421012112 is a deficient number, since it is larger than the sum of its proper divisors (19175104368).

20421012112 is a wasteful number, since it uses less digits than its factorization.

20421012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980830 (or 980824 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20421012112 its reverse (21121012402), we get a palindrome (41542024514).

The spelling of 20421012112 in words is "twenty billion, four hundred twenty-one million, twelve thousand, one hundred twelve".