20650402212 has 48 divisors (see below), whose sum is σ = 52573108224. Its totient is φ = 6256692000.

The previous prime is 20650402211. The next prime is 20650402247. The reversal of 20650402212 is 21220405602.

It is a happy number.

It is a super-2 number, since 2×20650402212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20650402211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1486137 + ... + 1499967.

It is an arithmetic number, because the mean of its divisors is an integer number (1095273088).

Almost surely, 2^20650402212 is an apocalyptic number.

20650402212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20650402212 is an abundant number, since it is smaller than the sum of its proper divisors (31922706012).

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

20650402212 is a wasteful number, since it uses less digits than its factorization.

20650402212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25160 (or 25158 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20650402212 its reverse (21220405602), we get a palindrome (41870807814).

The spelling of 20650402212 in words is "twenty billion, six hundred fifty million, four hundred two thousand, two hundred twelve".