20671273634 has 8 divisors (see below), whose sum is σ = 33825720528. Its totient is φ = 9396033460.

The previous prime is 20671273619. The next prime is 20671273639. The reversal of 20671273634 is 43637217602.

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

It is a junction number, because it is equal to n+sod(n) for n = 20671273591 and 20671273600.

It is not an unprimeable number, because it can be changed into a prime (20671273639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469801652 + ... + 469801695.

It is an arithmetic number, because the mean of its divisors is an integer number (4228215066).

Almost surely, 2^20671273634 is an apocalyptic number.

20671273634 is a deficient number, since it is larger than the sum of its proper divisors (13154446894).

20671273634 is a wasteful number, since it uses less digits than its factorization.

20671273634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939603360.

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 20671273634 in words is "twenty billion, six hundred seventy-one million, two hundred seventy-three thousand, six hundred thirty-four".