20690863734 has 16 divisors (see below), whose sum is σ = 41383180080. Its totient is φ = 6896712480.

The previous prime is 20690863729. The next prime is 20690863777. The reversal of 20690863734 is 43736809602.

It is a super-2 number, since 2×20690863734² (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, 237624 + ... + 312804.

It is an arithmetic number, because the mean of its divisors is an integer number (2586448755).

Almost surely, 2^20690863734 is an apocalyptic number.

20690863734 is an abundant number, since it is smaller than the sum of its proper divisors (20692316346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20690863734 is a wasteful number, since it uses less digits than its factorization.

20690863734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121055.

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 20690863734 in words is "twenty billion, six hundred ninety million, eight hundred sixty-three thousand, seven hundred thirty-four".