20533253310 has 384 divisors, whose sum is σ = 60969811968. Its totient is φ = 4769280000.

The previous prime is 20533253309. The next prime is 20533253369. The reversal of 20533253310 is 1335233502.

20533253310 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 325 + 331 + 0 = 666.

It is a super-2 number, since 2×20533253310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 135981735 + ... + 135981885.

It is an arithmetic number, because the mean of its divisors is an integer number (158775552).

Almost surely, 2^20533253310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20533253310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30484905984).

20533253310 is an abundant number, since it is smaller than the sum of its proper divisors (40436558658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20533253310 is a wasteful number, since it uses less digits than its factorization.

20533253310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 27.

Adding to 20533253310 its reverse (1335233502), we get a palindrome (21868486812).

The spelling of 20533253310 in words is "twenty billion, five hundred thirty-three million, two hundred fifty-three thousand, three hundred ten".