20402001012 has 24 divisors (see below), whose sum is σ = 47625139296. Its totient is φ = 6797742688.

The previous prime is 20402001001. The next prime is 20402001041. The reversal of 20402001012 is 21010020402.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336378 + ... + 392369.

It is an arithmetic number, because the mean of its divisors is an integer number (1984380804).

Almost surely, 2^20402001012 is an apocalyptic number.

It is an amenable number.

20402001012 is an abundant number, since it is smaller than the sum of its proper divisors (27223138284).

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

20402001012 is a wasteful number, since it uses less digits than its factorization.

20402001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731087 (or 731085 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20402001012 its reverse (21010020402), we get a palindrome (41412021414).

The spelling of 20402001012 in words is "twenty billion, four hundred two million, one thousand, twelve".