47021636 has 12 divisors (see below), whose sum is σ = 83415612. Its totient is φ = 23188608.

The previous prime is 47021621. The next prime is 47021641. The reversal of 47021636 is 63612074.

It can be written as a sum of positive squares in 2 ways, for example, as 25806400 + 21215236 = 5080^2 + 4606^2 .

It is a super-2 number, since 2×47021636² = 4422068504232992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47021599 and 47021608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80225 + ... + 80808.

It is an arithmetic number, because the mean of its divisors is an integer number (6951301).

Almost surely, 2^47021636 is an apocalyptic number.

It is an amenable number.

47021636 is a deficient number, since it is larger than the sum of its proper divisors (36393976).

47021636 is a wasteful number, since it uses less digits than its factorization.

47021636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161110 (or 161108 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 47021636 is about 6857.2323863203. The cubic root of 47021636 is about 360.9379758032.

The spelling of 47021636 in words is "forty-seven million, twenty-one thousand, six hundred thirty-six".