20415771392 has 18 divisors (see below), whose sum is σ = 40751794188. Its totient is φ = 10207885568.

The previous prime is 20415771379. The next prime is 20415771437. The reversal of 20415771392 is 29317751402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39874298 + ... + 39874809.

It is an arithmetic number, because the mean of its divisors is an integer number (2263988566).

Almost surely, 2^20415771392 is an apocalyptic number.

It is an amenable number.

20415771392 is a deficient number, since it is larger than the sum of its proper divisors (20336022796).

20415771392 is an frugal number, since it uses more digits than its factorization.

20415771392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79749123 (or 79749109 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 20415771392 in words is "twenty billion, four hundred fifteen million, seven hundred seventy-one thousand, three hundred ninety-two".