20213112402 has 72 divisors (see below), whose sum is σ = 53160359616. Its totient is φ = 5524074864.

The previous prime is 20213112401. The next prime is 20213112427. The reversal of 20213112402 is 20421131202.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20213112401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 477918 + ... + 518489.

It is an arithmetic number, because the mean of its divisors is an integer number (738338328).

Almost surely, 2^20213112402 is an apocalyptic number.

20213112402 is an abundant number, since it is smaller than the sum of its proper divisors (32947247214).

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

20213112402 is a wasteful number, since it uses less digits than its factorization.

20213112402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996452 (or 996442 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20213112402 its reverse (20421131202), we get a palindrome (40634243604).

The spelling of 20213112402 in words is "twenty billion, two hundred thirteen million, one hundred twelve thousand, four hundred two".