21145010134 has 16 divisors (see below), whose sum is σ = 31982613408. Its totient is φ = 10484485632.

The previous prime is 21145010123. The next prime is 21145010143. The reversal of 21145010134 is 43101054112.

It is a super-2 number, since 2×21145010134² (a number of 21 digits) contains 22 as substring.

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, 35959 + ... + 208765.

It is an arithmetic number, because the mean of its divisors is an integer number (1998913338).

Almost surely, 2^21145010134 is an apocalyptic number.

21145010134 is a deficient number, since it is larger than the sum of its proper divisors (10837603274).

21145010134 is a wasteful number, since it uses less digits than its factorization.

21145010134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173319.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 21145010134 its reverse (43101054112), we get a palindrome (64246064246).

The spelling of 21145010134 in words is "twenty-one billion, one hundred forty-five million, ten thousand, one hundred thirty-four".