20420334412 has 24 divisors (see below), whose sum is σ = 36140302800. Its totient is φ = 10094977536.

The previous prime is 20420334359. The next prime is 20420334419. The reversal of 20420334412 is 21443302402.

It is a happy number.

It is a super-2 number, since 2×20420334412² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20420334419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129639 + ... + 240097.

It is an arithmetic number, because the mean of its divisors is an integer number (1505845950).

Almost surely, 2^20420334412 is an apocalyptic number.

It is an amenable number.

20420334412 is a deficient number, since it is larger than the sum of its proper divisors (15719968388).

20420334412 is a wasteful number, since it uses less digits than its factorization.

20420334412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110985 (or 110983 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20420334412 its reverse (21443302402), we get a palindrome (41863636814).

The spelling of 20420334412 in words is "twenty billion, four hundred twenty million, three hundred thirty-four thousand, four hundred twelve".