20424012102 has 24 divisors (see below), whose sum is σ = 47656028784. Its totient is φ = 6284311344.

The previous prime is 20424012079. The next prime is 20424012113. The reversal of 20424012102 is 20121042402.

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, 43640818 + ... + 43641285.

It is an arithmetic number, because the mean of its divisors is an integer number (1985667866).

Almost surely, 2^20424012102 is an apocalyptic number.

20424012102 is an abundant number, since it is smaller than the sum of its proper divisors (27232016682).

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

20424012102 is a wasteful number, since it uses less digits than its factorization.

20424012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87282124 (or 87282121 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20424012102 its reverse (20121042402), we get a palindrome (40545054504).

The spelling of 20424012102 in words is "twenty billion, four hundred twenty-four million, twelve thousand, one hundred two".