21611236141420 has 24 divisors (see below), whose sum is σ = 45398422420848. Its totient is φ = 8641670356800.

The previous prime is 21611236141409. The next prime is 21611236141463. The reversal of 21611236141420 is 2414163211612.

It is a happy 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, 176443486 + ... + 176565925.

It is an arithmetic number, because the mean of its divisors is an integer number (1891600934202).

Almost surely, 2^{21611236141420} is an apocalyptic number.

21611236141420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21611236141420 is an abundant number, since it is smaller than the sum of its proper divisors (23787186279428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21611236141420 is a wasteful number, since it uses less digits than its factorization.

21611236141420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353012481 (or 353012479 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 21611236141420 in words is "twenty-one trillion, six hundred eleven billion, two hundred thirty-six million, one hundred forty-one thousand, four hundred twenty".