21467264624661 has 16 divisors (see below), whose sum is σ = 30502977306624. Its totient is φ = 13398009125424.

The previous prime is 21467264624639. The next prime is 21467264624683. The reversal of 21467264624661 is 16642646276412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21467264624639) and next prime (21467264624683).

It is not a de Polignac number, because 21467264624661 - 2²³ = 21467256236053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21467264124661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3309781621 + ... + 3309788106.

It is an arithmetic number, because the mean of its divisors is an integer number (1906436081664).

Almost surely, 2^{21467264624661} is an apocalyptic number.

It is an amenable number.

21467264624661 is a deficient number, since it is larger than the sum of its proper divisors (9035712681963).

21467264624661 is a wasteful number, since it uses less digits than its factorization.

21467264624661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6619569800.

The product of its digits is 27869184, while the sum is 57.

The spelling of 21467264624661 in words is "twenty-one trillion, four hundred sixty-seven billion, two hundred sixty-four million, six hundred twenty-four thousand, six hundred sixty-one".