21437943840152 has 32 divisors (see below), whose sum is σ = 45955611829920. Its totient is φ = 9184258068480.

The previous prime is 21437943840143. The next prime is 21437943840161. The reversal of 21437943840152 is 25104834973412.

It is an interprime number because it is at equal distance from previous prime (21437943840143) and next prime (21437943840161).

It is a super-2 number, since 2×21437943840152² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21437943840094 and 21437943840103.

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, 71351849 + ... + 71651672.

It is an arithmetic number, because the mean of its divisors is an integer number (1436112869685).

Almost surely, 2^{21437943840152} is an apocalyptic number.

It is an amenable number.

21437943840152 is an abundant number, since it is smaller than the sum of its proper divisors (24517667989768).

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

21437943840152 is a wasteful number, since it uses less digits than its factorization.

21437943840152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143006211 (or 143006207 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 21437943840152 in words is "twenty-one trillion, four hundred thirty-seven billion, nine hundred forty-three million, eight hundred forty thousand, one hundred fifty-two".