21070653370377 has 32 divisors (see below), whose sum is σ = 30622885915776. Its totient is φ = 12809049177600.

The previous prime is 21070653370373. The next prime is 21070653370391. The reversal of 21070653370377 is 77307335607012.

It is not a de Polignac number, because 21070653370377 - 2² = 21070653370373 is a prime.

It is a super-2 number, since 2×21070653370377² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21070653370373) 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, 32505477 + ... + 33147357.

It is an arithmetic number, because the mean of its divisors is an integer number (956965184868).

Almost surely, 2^{21070653370377} is an apocalyptic number.

It is an amenable number.

21070653370377 is a deficient number, since it is larger than the sum of its proper divisors (9552232545399).

21070653370377 is a wasteful number, since it uses less digits than its factorization.

21070653370377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652121.

The product of its (nonzero) digits is 3889620, while the sum is 51.

Adding to 21070653370377 its reverse (77307335607012), we get a palindrome (98377988977389).

The spelling of 21070653370377 in words is "twenty-one trillion, seventy billion, six hundred fifty-three million, three hundred seventy thousand, three hundred seventy-seven".