21357356007057 has 32 divisors (see below), whose sum is σ = 33959874336768. Its totient is φ = 11673464981376.

The previous prime is 21357356007023. The next prime is 21357356007061. The reversal of 21357356007057 is 75070065375312.

It is not a de Polignac number, because 21357356007057 - 2⁶ = 21357356006993 is a prime.

It is a super-2 number, since 2×21357356007057² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21357356007157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66650173 + ... + 66969845.

It is an arithmetic number, because the mean of its divisors is an integer number (1061246073024).

Almost surely, 2^{21357356007057} is an apocalyptic number.

It is an amenable number.

21357356007057 is a deficient number, since it is larger than the sum of its proper divisors (12602518329711).

21357356007057 is a wasteful number, since it uses less digits than its factorization.

21357356007057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458029.

The product of its (nonzero) digits is 4630500, while the sum is 51.

The spelling of 21357356007057 in words is "twenty-one trillion, three hundred fifty-seven billion, three hundred fifty-six million, seven thousand, fifty-seven".