20553236471 has 24 divisors (see below), whose sum is σ = 21681563904. Its totient is φ = 19481465520.

The previous prime is 20553236467. The next prime is 20553236503. The reversal of 20553236471 is 17463235502.

It is not a de Polignac number, because 20553236471 - 2² = 20553236467 is a prime.

It is a super-3 number, since 3×20553236471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553236411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44010980 + ... + 44011446.

It is an arithmetic number, because the mean of its divisors is an integer number (903398496).

Almost surely, 2^20553236471 is an apocalyptic number.

20553236471 is a deficient number, since it is larger than the sum of its proper divisors (1128327433).

20553236471 is a wasteful number, since it uses less digits than its factorization.

20553236471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 38.

The spelling of 20553236471 in words is "twenty billion, five hundred fifty-three million, two hundred thirty-six thousand, four hundred seventy-one".