21987769362 has 16 divisors (see below), whose sum is σ = 47358272640. Its totient is φ = 6765467472.

The previous prime is 21987769327. The next prime is 21987769381. The reversal of 21987769362 is 26396778912.

It is a junction number, because it is equal to n+sod(n) for n = 21987769296 and 21987769305.

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, 140947162 + ... + 140947317.

It is an arithmetic number, because the mean of its divisors is an integer number (2959892040).

Almost surely, 2^21987769362 is an apocalyptic number.

21987769362 is an abundant number, since it is smaller than the sum of its proper divisors (25370503278).

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

21987769362 is a wasteful number, since it uses less digits than its factorization.

21987769362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281894497.

The product of its digits is 13716864, while the sum is 60.

The spelling of 21987769362 in words is "twenty-one billion, nine hundred eighty-seven million, seven hundred sixty-nine thousand, three hundred sixty-two".