20221919236 has 24 divisors (see below), whose sum is σ = 35491337784. Its totient is φ = 10081566720.

The previous prime is 20221919191. The next prime is 20221919251. The reversal of 20221919236 is 63291912202.

It can be written as a sum of positive squares in 4 ways, for example, as 9614979136 + 10606940100 = 98056^2 + 102990^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20221919195 and 20221919204.

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, 4766076 + ... + 4770316.

It is an arithmetic number, because the mean of its divisors is an integer number (1478805741).

Almost surely, 2^20221919236 is an apocalyptic number.

It is an amenable number.

20221919236 is a deficient number, since it is larger than the sum of its proper divisors (15269418548).

20221919236 is a wasteful number, since it uses less digits than its factorization.

20221919236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7431 (or 7429 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 20221919236 in words is "twenty billion, two hundred twenty-one million, nine hundred nineteen thousand, two hundred thirty-six".