21534042326 has 16 divisors (see below), whose sum is σ = 33274098000. Its totient is φ = 10446037728.

The previous prime is 21534042317. The next prime is 21534042347. The reversal of 21534042326 is 62324043512.

It is a junction number, because it is equal to n+sod(n) for n = 21534042292 and 21534042301.

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, 827441 + ... + 853068.

It is an arithmetic number, because the mean of its divisors is an integer number (2079631125).

Almost surely, 2^21534042326 is an apocalyptic number.

21534042326 is a deficient number, since it is larger than the sum of its proper divisors (11740055674).

21534042326 is a wasteful number, since it uses less digits than its factorization.

21534042326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680703.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 21534042326 its reverse (62324043512), we get a palindrome (83858085838).

The spelling of 21534042326 in words is "twenty-one billion, five hundred thirty-four million, forty-two thousand, three hundred twenty-six".