20727634 has 16 divisors (see below), whose sum is σ = 32915520. Its totient is φ = 9772560.

The previous prime is 20727601. The next prime is 20727643. The reversal of 20727634 is 43672702.

It is a happy number.

It is a super-2 number, since 2×20727634² = 859269622475912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20727596 and 20727605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1662 + ... + 6649.

It is an arithmetic number, because the mean of its divisors is an integer number (2057220).

Almost surely, 2^20727634 is an apocalyptic number.

20727634 is a deficient number, since it is larger than the sum of its proper divisors (12187886).

20727634 is a wasteful number, since it uses less digits than its factorization.

20727634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8385.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20727634 is about 4552.7611402313. The cubic root of 20727634 is about 274.6944661775.

The spelling of 20727634 in words is "twenty million, seven hundred twenty-seven thousand, six hundred thirty-four".