20102323212 has 18 divisors (see below), whose sum is σ = 50814205988. Its totient is φ = 6700774392.

The previous prime is 20102323139. The next prime is 20102323249. The reversal of 20102323212 is 21232320102.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 279198898 + ... + 279198969.

Almost surely, 2^20102323212 is an apocalyptic number.

It is an amenable number.

20102323212 is an abundant number, since it is smaller than the sum of its proper divisors (30711882776).

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

20102323212 is a wasteful number, since it uses less digits than its factorization.

20102323212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558397877 (or 558397872 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20102323212 its reverse (21232320102), we get a palindrome (41334643314).

The spelling of 20102323212 in words is "twenty billion, one hundred two million, three hundred twenty-three thousand, two hundred twelve".