21467172621513 has 64 divisors (see below), whose sum is σ = 30630682656000. Its totient is φ = 13326376550400.

The previous prime is 21467172621497. The next prime is 21467172621541. The reversal of 21467172621513 is 31512627176412.

It is a happy number.

It is not a de Polignac number, because 21467172621513 - 2⁴ = 21467172621497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21467172621563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2251875295 + ... + 2251884827.

It is an arithmetic number, because the mean of its divisors is an integer number (478604416500).

Almost surely, 2^{21467172621513} is an apocalyptic number.

It is an amenable number.

21467172621513 is a deficient number, since it is larger than the sum of its proper divisors (9163510034487).

21467172621513 is a wasteful number, since it uses less digits than its factorization.

21467172621513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10842.

The product of its digits is 846720, while the sum is 48.

Adding to 21467172621513 its reverse (31512627176412), we get a palindrome (52979799797925).

The spelling of 21467172621513 in words is "twenty-one trillion, four hundred sixty-seven billion, one hundred seventy-two million, six hundred twenty-one thousand, five hundred thirteen".