21835370700557 has 32 divisors (see below), whose sum is σ = 24024564748800. Its totient is φ = 19762355642368.

The previous prime is 21835370700499. The next prime is 21835370700571. The reversal of 21835370700557 is 75500707353812.

It is a cyclic number.

It is not a de Polignac number, because 21835370700557 - 2²² = 21835366506253 is a prime.

It is a super-2 number, since 2×21835370700557² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21835370700499 and 21835370700508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21835370700757) 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, 90059669 + ... + 90301797.

It is an arithmetic number, because the mean of its divisors is an integer number (750767648400).

Almost surely, 2^{21835370700557} is an apocalyptic number.

It is an amenable number.

21835370700557 is a deficient number, since it is larger than the sum of its proper divisors (2189194048243).

21835370700557 is a wasteful number, since it uses less digits than its factorization.

21835370700557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244165.

The product of its (nonzero) digits is 6174000, while the sum is 53.

The spelling of 21835370700557 in words is "twenty-one trillion, eight hundred thirty-five billion, three hundred seventy million, seven hundred thousand, five hundred fifty-seven".