20511369848 has 8 divisors (see below), whose sum is σ = 38458818480. Its totient is φ = 10255684920.

The previous prime is 20511369817. The next prime is 20511369869. The reversal of 20511369848 is 84896311502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281960608 + ... + 1281960623.

It is an arithmetic number, because the mean of its divisors is an integer number (4807352310).

Almost surely, 2^20511369848 is an apocalyptic number.

It is an amenable number.

20511369848 is a deficient number, since it is larger than the sum of its proper divisors (17947448632).

20511369848 is a wasteful number, since it uses less digits than its factorization.

20511369848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563921237 (or 2563921233 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 20511369848 in words is "twenty billion, five hundred eleven million, three hundred sixty-nine thousand, eight hundred forty-eight".