21454534053402 has 64 divisors (see below), whose sum is σ = 45781170274944. Its totient is φ = 6679308072960.

The previous prime is 21454534053353. The next prime is 21454534053437. The reversal of 21454534053402 is 20435043545412.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38895252 + ... + 39442992.

It is an arithmetic number, because the mean of its divisors is an integer number (715330785546).

Almost surely, 2^{21454534053402} is an apocalyptic number.

21454534053402 is an abundant number, since it is smaller than the sum of its proper divisors (24326636221542).

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

21454534053402 is a wasteful number, since it uses less digits than its factorization.

21454534053402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550703.

The product of its (nonzero) digits is 1152000, while the sum is 42.

Adding to 21454534053402 its reverse (20435043545412), we get a palindrome (41889577598814).

The spelling of 21454534053402 in words is "twenty-one trillion, four hundred fifty-four billion, five hundred thirty-four million, fifty-three thousand, four hundred two".