20521376630 has 16 divisors (see below), whose sum is σ = 37220453424. Its totient is φ = 8145889440.

The previous prime is 20521376609. The next prime is 20521376663. The reversal of 20521376630 is 3667312502.

It is a super-2 number, since 2×20521376630² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 7831277 + ... + 7833896.

It is an arithmetic number, because the mean of its divisors is an integer number (2326278339).

Almost surely, 2^20521376630 is an apocalyptic number.

20521376630 is a deficient number, since it is larger than the sum of its proper divisors (16699076794).

20521376630 is a wasteful number, since it uses less digits than its factorization.

20521376630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15665311.

The product of its (nonzero) digits is 45360, while the sum is 35.

The spelling of 20521376630 in words is "twenty billion, five hundred twenty-one million, three hundred seventy-six thousand, six hundred thirty".