20545403534 has 16 divisors (see below), whose sum is σ = 31504412160. Its totient is φ = 10045880160.

The previous prime is 20545403503. The next prime is 20545403563. The reversal of 20545403534 is 43530454502.

It is a super-2 number, since 2×20545403534² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20545403494 and 20545403503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465614 + ... + 507825.

It is an arithmetic number, because the mean of its divisors is an integer number (1969025760).

Almost surely, 2^20545403534 is an apocalyptic number.

20545403534 is a deficient number, since it is larger than the sum of its proper divisors (10959008626).

20545403534 is a wasteful number, since it uses less digits than its factorization.

20545403534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973675.

The product of its (nonzero) digits is 144000, while the sum is 35.

The spelling of 20545403534 in words is "twenty billion, five hundred forty-five million, four hundred three thousand, five hundred thirty-four".