21146162173730 has 32 divisors (see below), whose sum is σ = 41524230944448. Its totient is φ = 7689354638400.

The previous prime is 21146162173729. The next prime is 21146162173753. The reversal of 21146162173730 is 3737126164112.

It is a super-2 number, since 2×21146162173730² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3428840 + ... + 7351820.

It is an arithmetic number, because the mean of its divisors is an integer number (1297632217014).

Almost surely, 2^{21146162173730} is an apocalyptic number.

21146162173730 is a deficient number, since it is larger than the sum of its proper divisors (20378068770718).

21146162173730 is a wasteful number, since it uses less digits than its factorization.

21146162173730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972002.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 21146162173730 in words is "twenty-one trillion, one hundred forty-six billion, one hundred sixty-two million, one hundred seventy-three thousand, seven hundred thirty".