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21274436541 = 346315316369
BaseRepresentation
bin10011110100000011…
…100010001110111101
32000220122121100112010
4103310003202032331
5322032223432131
613435013001433
71352125504221
oct236403421675
960818540463
1021274436541
119027957066
124158923279
1320107320b7
14105b670781
15847aabb46
hex4f40e23bd

21274436541 has 8 divisors (see below), whose sum is σ = 28427182720. Its totient is φ = 14152324032.

The previous prime is 21274436537. The next prime is 21274436567. The reversal of 21274436541 is 14563447212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21274436541 - 22 = 21274436537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21274436541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274436341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7656796 + ... + 7659573.

It is an arithmetic number, because the mean of its divisors is an integer number (3553397840).

Almost surely, 221274436541 is an apocalyptic number.

It is an amenable number.

21274436541 is a deficient number, since it is larger than the sum of its proper divisors (7152746179).

21274436541 is a wasteful number, since it uses less digits than its factorization.

21274436541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15316835.

The product of its digits is 161280, while the sum is 39.

The spelling of 21274436541 in words is "twenty-one billion, two hundred seventy-four million, four hundred thirty-six thousand, five hundred forty-one".

Divisors: 1 3 463 1389 15316369 45949107 7091478847 21274436541