21055131034 has 32 divisors (see below), whose sum is σ = 36962265600. Its totient is φ = 8809257600.

The previous prime is 21055130983. The next prime is 21055131059. The reversal of 21055131034 is 43013155012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8517 + ... + 205384.

It is an arithmetic number, because the mean of its divisors is an integer number (1155070800).

Almost surely, 2^21055131034 is an apocalyptic number.

21055131034 is a deficient number, since it is larger than the sum of its proper divisors (15907134566).

21055131034 is a wasteful number, since it uses less digits than its factorization.

21055131034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214078.

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

Adding to 21055131034 its reverse (43013155012), we get a palindrome (64068286046).

The spelling of 21055131034 in words is "twenty-one billion, fifty-five million, one hundred thirty-one thousand, thirty-four".