20988438462 has 36 divisors (see below), whose sum is σ = 46949539104. Its totient is φ = 6769360080.

The previous prime is 20988438461. The next prime is 20988438467. The reversal of 20988438462 is 26483488902.

It is a junction number, because it is equal to n+sod(n) for n = 20988438399 and 20988438408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988438461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3419148 + ... + 3425280.

It is an arithmetic number, because the mean of its divisors is an integer number (1304153864).

Almost surely, 2^20988438462 is an apocalyptic number.

20988438462 is an abundant number, since it is smaller than the sum of its proper divisors (25961100642).

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

20988438462 is an frugal number, since it uses more digits than its factorization.

20988438462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12305 (or 6169 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 54.

The spelling of 20988438462 in words is "twenty billion, nine hundred eighty-eight million, four hundred thirty-eight thousand, four hundred sixty-two".