20621166070 has 32 divisors (see below), whose sum is σ = 40024666080. Its totient is φ = 7623740160.

The previous prime is 20621166037. The next prime is 20621166113. The reversal of 20621166070 is 7066112602.

It is a happy number.

It is a congruent 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, 1315777 + ... + 1331356.

It is an arithmetic number, because the mean of its divisors is an integer number (1250770815).

Almost surely, 2^20621166070 is an apocalyptic number.

20621166070 is a deficient number, since it is larger than the sum of its proper divisors (19403500010).

20621166070 is a wasteful number, since it uses less digits than its factorization.

20621166070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647200.

The product of its (nonzero) digits is 6048, while the sum is 31.

Adding to 20621166070 its reverse (7066112602), we get a palindrome (27687278672).

The spelling of 20621166070 in words is "twenty billion, six hundred twenty-one million, one hundred sixty-six thousand, seventy".