21534045451034 has 16 divisors (see below), whose sum is σ = 32313495656448. Its totient is φ = 10762880577072.

The previous prime is 21534045451021. The next prime is 21534045451057. The reversal of 21534045451034 is 43015454043512.

It is a super-2 number, since 2×21534045451034² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21534045450982 and 21534045451000.

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, 149238647 + ... + 149382869.

It is an arithmetic number, because the mean of its divisors is an integer number (2019593478528).

Almost surely, 2^{21534045451034} is an apocalyptic number.

21534045451034 is a deficient number, since it is larger than the sum of its proper divisors (10779450205414).

21534045451034 is a wasteful number, since it uses less digits than its factorization.

21534045451034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172429.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 21534045451034 its reverse (43015454043512), we get a palindrome (64549499494546).

The spelling of 21534045451034 in words is "twenty-one trillion, five hundred thirty-four billion, forty-five million, four hundred fifty-one thousand, thirty-four".