20420023212224 has 56 divisors (see below), whose sum is σ = 42310018697040. Its totient is φ = 9765811844096.

The previous prime is 20420023212203. The next prime is 20420023212269. The reversal of 20420023212224 is 42221232002402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20420023212193 and 20420023212202.

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, 51213407 + ... + 51610590.

Almost surely, 2^{20420023212224} is an apocalyptic number.

It is an amenable number.

20420023212224 is an abundant number, since it is smaller than the sum of its proper divisors (21889995484816).

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

20420023212224 is a wasteful number, since it uses less digits than its factorization.

20420023212224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102824145 (or 102824135 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20420023212224 its reverse (42221232002402), we get a palindrome (62641255214626).

The spelling of 20420023212224 in words is "twenty trillion, four hundred twenty billion, twenty-three million, two hundred twelve thousand, two hundred twenty-four".