21506776712342 has 8 divisors (see below), whose sum is σ = 32402280333816. Its totient is φ = 10706016601072.

The previous prime is 21506776712339. The next prime is 21506776712363. The reversal of 21506776712342 is 24321767760512.

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

It is a super-3 number, since 3×21506776712342³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23685876983 + ... + 23685877890.

It is an arithmetic number, because the mean of its divisors is an integer number (4050285041727).

Almost surely, 2^{21506776712342} is an apocalyptic number.

21506776712342 is a deficient number, since it is larger than the sum of its proper divisors (10895503621474).

21506776712342 is a wasteful number, since it uses less digits than its factorization.

21506776712342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47371755102.

The product of its (nonzero) digits is 5927040, while the sum is 53.

The spelling of 21506776712342 in words is "twenty-one trillion, five hundred six billion, seven hundred seventy-six million, seven hundred twelve thousand, three hundred forty-two".