20091020192 has 24 divisors (see below), whose sum is σ = 39945828132. Its totient is φ = 9946048000.

The previous prime is 20091020179. The next prime is 20091020227. The reversal of 20091020192 is 29102019002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20083424656 + 7595536 = 141716^2 + 2756^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3104909 + ... + 3111372.

Almost surely, 2^20091020192 is an apocalyptic number.

It is an amenable number.

20091020192 is a deficient number, since it is larger than the sum of its proper divisors (19854807940).

20091020192 is a wasteful number, since it uses less digits than its factorization.

20091020192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216392 (or 6216384 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

Adding to 20091020192 its reverse (29102019002), we get a palindrome (49193039194).

It can be divided in two parts, 2009 and 1020192, that added together give a palindrome (1022201).

The spelling of 20091020192 in words is "twenty billion, ninety-one million, twenty thousand, one hundred ninety-two".