20261616572 has 24 divisors (see below), whose sum is σ = 35944900992. Its totient is φ = 9992430000.

The previous prime is 20261616457. The next prime is 20261616577. The reversal of 20261616572 is 27561616202.

It is a super-2 number, since 2×20261616572² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261616577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5447 + ... + 201377.

It is an arithmetic number, because the mean of its divisors is an integer number (1497704208).

Almost surely, 2^20261616572 is an apocalyptic number.

It is an amenable number.

20261616572 is a deficient number, since it is larger than the sum of its proper divisors (15683284420).

20261616572 is a wasteful number, since it uses less digits than its factorization.

20261616572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196289 (or 196287 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 20261616572 in words is "twenty billion, two hundred sixty-one million, six hundred sixteen thousand, five hundred seventy-two".