20212461616 has 40 divisors (see below), whose sum is σ = 39602916144. Its totient is φ = 9992989440.

The previous prime is 20212461613. The next prime is 20212461623. The reversal of 20212461616 is 61616421202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20212461613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494106 + ... + 533446.

Almost surely, 2^20212461616 is an apocalyptic number.

It is an amenable number.

20212461616 is a deficient number, since it is larger than the sum of its proper divisors (19390454528).

20212461616 is a wasteful number, since it uses less digits than its factorization.

20212461616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39709 (or 39703 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 20212461616 its reverse (61616421202), we get a palindrome (81828882818).

The spelling of 20212461616 in words is "twenty billion, two hundred twelve million, four hundred sixty-one thousand, six hundred sixteen".