20511130534 has 8 divisors (see below), whose sum is σ = 32385995640. Its totient is φ = 9715798656.

The previous prime is 20511130531. The next prime is 20511130561. The reversal of 20511130534 is 43503111502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×20511130534³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20511130499 and 20511130508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20511130531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269883259 + ... + 269883334.

It is an arithmetic number, because the mean of its divisors is an integer number (4048249455).

Almost surely, 2^20511130534 is an apocalyptic number.

20511130534 is a deficient number, since it is larger than the sum of its proper divisors (11874865106).

20511130534 is a wasteful number, since it uses less digits than its factorization.

20511130534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539766614.

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 20511130534 in words is "twenty billion, five hundred eleven million, one hundred thirty thousand, five hundred thirty-four".